diff --git a/core/src/main/resources/hudson/PluginManager/sidepanel.jelly b/core/src/main/resources/hudson/PluginManager/sidepanel.jelly
index 0d3fc3fb43..21755b3207 100644
--- a/core/src/main/resources/hudson/PluginManager/sidepanel.jelly
+++ b/core/src/main/resources/hudson/PluginManager/sidepanel.jelly
@@ -27,7 +27,7 @@ THE SOFTWARE.
 -->
 <?jelly escape-by-default='true'?>
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:i="jelly:fmt">
-  <l:side-panel sticky="true">
+  <l:side-panel>
     <l:app-bar title="${%Plugins}" />
     <l:tasks>
       <l:task href="${rootURL}/manage/pluginManager/" icon="symbol-download" title="${%Updates}" badge="${app.updateCenter.badge}"/>
diff --git a/core/src/main/resources/hudson/model/Job/configure.jelly b/core/src/main/resources/hudson/model/Job/configure.jelly
index 18a914f4bc..78e0aed76b 100644
--- a/core/src/main/resources/hudson/model/Job/configure.jelly
+++ b/core/src/main/resources/hudson/model/Job/configure.jelly
@@ -36,14 +36,14 @@ THE SOFTWARE.
 
     <l:breadcrumb title="${readOnlyMode ? '%Configuration' : '%Configure'}" />
 
-    <l:side-panel sticky="true">
+    <l:side-panel>
       <l:app-bar title="${readOnlyMode ? '%Configuration' : '%Configure'}" />
       <div id="tasks">
         <l:skeleton type="side-panel" />
       </div>
     </l:side-panel>
 
-    <l:main-panel>
+    <l:main-panel width="narrow">
       <f:form method="post" class="jenkins-form" action="configSubmit" name="config" tableClass="config-table">
         <l:app-bar title="${%General}" headingLevel="h2">
           <p:config-disableBuild />
diff --git a/core/src/main/resources/hudson/model/View/footer.jelly b/core/src/main/resources/hudson/model/View/footer.jelly
new file mode 100644
index 0000000000..f600eb2fdc
--- /dev/null
+++ b/core/src/main/resources/hudson/model/View/footer.jelly
@@ -0,0 +1,52 @@
+<!--
+The MIT License
+
+Copyright (c) 2026, Jan Faracik
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+-->
+
+<?jelly escape-by-default='true'?>
+<j:jelly xmlns:j="jelly:core" xmlns:l="/lib/layout" xmlns:dd="/lib/layout/dropdowns">
+  <footer class="page-footer">
+    <div class="page-footer__flex-row">
+      <div class="page-footer__footer-id-placeholder" id="footer"></div>
+
+      <div class="page-footer__links">
+        <l:overflowButton text="Jenkins ${h.version}"
+                          clazz="jenkins-button--tertiary jenkins_ver"
+                          icon="${null}"
+                          tooltip="${null}">
+          <l:hasPermission permission="${app.SYSTEM_READ}">
+            <dd:item icon="symbol-jenkins"
+                     text="${%About Jenkins}"
+                     href="${rootURL}/manage/about" />
+            <dd:separator />
+          </l:hasPermission>
+          <dd:item icon="symbol-heart"
+                   text="${%Get involved}"
+                   href="https://www.jenkins.io/participate/" />
+          <dd:item icon="symbol-external"
+                   text="${%Website}"
+                   href="${h.getFooterURL()}" />
+        </l:overflowButton>
+      </div>
+    </div>
+  </footer>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/model/View/index.jelly b/core/src/main/resources/hudson/model/View/index.jelly
index 4592096233..fd75659f51 100644
--- a/core/src/main/resources/hudson/model/View/index.jelly
+++ b/core/src/main/resources/hudson/model/View/index.jelly
@@ -48,6 +48,8 @@ THE SOFTWARE.
 
           <j:set var="items" value="${it.items}"/>
           <st:include page="main.jelly" />
+          
+          <st:include page="footer.jelly" />
         </l:main-panel>
         <l:header>
           <!-- for screen resolution detection -->
diff --git a/core/src/main/resources/hudson/model/View/new-view-page.jelly b/core/src/main/resources/hudson/model/View/new-view-page.jelly
index fa88acbb68..f315aefded 100644
--- a/core/src/main/resources/hudson/model/View/new-view-page.jelly
+++ b/core/src/main/resources/hudson/model/View/new-view-page.jelly
@@ -139,6 +139,8 @@ THE SOFTWARE.
 
         <j:set var="items" value="${it.items}"/>
         <st:include page="main.jelly" />
+
+        <st:include page="footer.jelly" />
       </div>
     </l:main-panel>
   </l:layout>
diff --git a/core/src/main/resources/lib/layout/layout.jelly b/core/src/main/resources/lib/layout/layout.jelly
index 399aade734..0e1312f5f3 100644
--- a/core/src/main/resources/lib/layout/layout.jelly
+++ b/core/src/main/resources/lib/layout/layout.jelly
@@ -25,7 +25,7 @@ THE SOFTWARE.
 -->
 <?jelly escape-by-default='true'?>
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:i="jelly:fmt"
-         xmlns:x="jelly:xml" xmlns:dd="/lib/layout/dropdowns">
+         xmlns:x="jelly:xml">
   <st:documentation> <![CDATA[
     Outer-most tag for a normal (non-AJAX) HTML rendering.
     This is used with nested <header>, <side-panel>, and <main-panel>
@@ -172,53 +172,27 @@ THE SOFTWARE.
                     logout="${%logout}"/>
     </j:if>
 
-    <div id="page-body" class="app-page-body app-page-body--${layoutType} clear">
+    <j:if test="${layoutType != 'full-screen'}">
+      <div class="app-page-frame__blur" />
+      <div class="app-page-frame__mask" />
+      <div class="app-page-frame__background" />
+    </j:if>
+
+    <div id="page-body" class="${layoutType eq 'full-screen' ? 'app-full-screen-page-body' : 'app-page-body'} clear">
       <j:if test="${layoutType=='two-column'}">
         <j:set var="mode" value="side-panel" />
         <d:invokeBody />
       </j:if>
-      <div id="main-panel">
+      <div class="app-page-body__contents">
         <j:set var="mode" value="main-panel" />
         <d:invokeBody/>
       </div>
     </div>
 
-    <j:if test="${layoutType!='full-screen'}">
-      <footer class="page-footer jenkins-mobile-hide">
-        <div class="page-footer__flex-row">
-          <div class="page-footer__footer-id-placeholder" id="footer"></div>
-
-          <j:if test="${extensionsAvailable}">
-            <j:forEach var="pd" items="${h.pageDecorators}">
-              <st:include it="${pd}" page="footer.jelly" optional="true" />
-            </j:forEach>
-          </j:if>
-
-          <div class="page-footer__links">
-            <j:if test="${!empty(it.api)}">
-              <a class="jenkins-button jenkins-button--tertiary rest-api" href="api/">REST API</a>
-            </j:if>
-
-            <l:overflowButton text="Jenkins ${h.version}"
-                              clazz="jenkins-button--tertiary jenkins_ver"
-                              icon="${null}"
-                              tooltip="${null}">
-              <l:hasPermission permission="${app.SYSTEM_READ}">
-                <dd:item icon="symbol-jenkins"
-                        text="${%About Jenkins}"
-                         href="${rootURL}/manage/about" />
-                <dd:separator />
-              </l:hasPermission>
-              <dd:item icon="symbol-heart"
-                       text="${%Get involved}"
-                       href="https://www.jenkins.io/participate/" />
-              <dd:item icon="symbol-external"
-                       text="${%Website}"
-                       href="${h.getFooterURL()}" />
-            </l:overflowButton>
-          </div>
-        </div>
-      </footer>
+    <j:if test="${layoutType!='full-screen' and extensionsAvailable}">
+      <j:forEach var="pd" items="${h.pageDecorators}">
+        <st:include it="${pd}" page="footer.jelly" optional="true" />
+      </j:forEach>
     </j:if>
   </body>
 </html>
diff --git a/core/src/main/resources/lib/layout/main-panel.jelly b/core/src/main/resources/lib/layout/main-panel.jelly
index 6b16dd6f55..a097d8d743 100644
--- a/core/src/main/resources/lib/layout/main-panel.jelly
+++ b/core/src/main/resources/lib/layout/main-panel.jelly
@@ -26,40 +26,47 @@ THE SOFTWARE.
 <j:jelly xmlns:j="jelly:core" xmlns:x="jelly:xml" xmlns:st="jelly:stapler" xmlns:d="jelly:define">
   <st:documentation>
     Generates the body as the main content part of a Jenkins page.
+    <st:attribute name="width">
+      Optional, sets the width of the page. Available options are 'default', 'narrow', or 'wide'.
+    </st:attribute>
   </st:documentation>
 
   <j:if test="${mode=='main-panel'}">
-    <j:if test="${app.isQuietingDown()}">
-      <j:choose>
-        <j:when test="${app.isPreparingSafeRestart()}">
-          <div id='safe-restart-msg'>
-            <j:choose>
-              <j:when test="${!app.getQuietDownReason().trim().isEmpty()}">
-                ${app.getQuietDownReason()}
-              </j:when>
-              <j:otherwise>
-                ${%saferestart}
-              </j:otherwise>
-            </j:choose>
-          </div>
-        </j:when>
-        <j:otherwise>
-          <div id='shutdown-msg'>
-            <j:choose>
-              <j:when test="${app.getQuietDownReason() != null}">
-                ${app.getQuietDownReason()}
-              </j:when>
-              <j:otherwise>
-                ${%shutdown}
-              </j:otherwise>
-            </j:choose>
-          </div>
-        </j:otherwise>
-      </j:choose>
-    </j:if>
-    <a id="skip2content" />
-    <x:comment>&#10;start of main content ⇒&#10;</x:comment>
-    <d:invokeBody />
-    <x:comment>&#10;⇐ end of main content&#10;</x:comment>
+    <div id="main-panel" class="app-main-panel
+              ${attrs.width eq 'wide' ? 'app-main-panel--wide' : ''}
+              ${attrs.width eq 'narrow' ? 'app-main-panel--narrow' : ''}">
+      <j:if test="${app.isQuietingDown()}">
+        <j:choose>
+          <j:when test="${app.isPreparingSafeRestart()}">
+            <div id='safe-restart-msg'>
+              <j:choose>
+                <j:when test="${!app.getQuietDownReason().trim().isEmpty()}">
+                  ${app.getQuietDownReason()}
+                </j:when>
+                <j:otherwise>
+                  ${%saferestart}
+                </j:otherwise>
+              </j:choose>
+            </div>
+          </j:when>
+          <j:otherwise>
+            <div id='shutdown-msg'>
+              <j:choose>
+                <j:when test="${app.getQuietDownReason() != null}">
+                  ${app.getQuietDownReason()}
+                </j:when>
+                <j:otherwise>
+                  ${%shutdown}
+                </j:otherwise>
+              </j:choose>
+            </div>
+          </j:otherwise>
+        </j:choose>
+      </j:if>
+      <a id="skip2content" />
+      <x:comment>&#10;start of main content ⇒&#10;</x:comment>
+      <d:invokeBody />
+      <x:comment>&#10;⇐ end of main content&#10;</x:comment>
+    </div>
   </j:if>
 </j:jelly>
diff --git a/core/src/main/resources/lib/layout/settings-subpage.jelly b/core/src/main/resources/lib/layout/settings-subpage.jelly
index ca1e91058e..f497383df2 100644
--- a/core/src/main/resources/lib/layout/settings-subpage.jelly
+++ b/core/src/main/resources/lib/layout/settings-subpage.jelly
@@ -65,7 +65,7 @@ THE SOFTWARE.
       Defaults to false if not set.
     </st:attribute>
     <st:attribute name="width">
-      Optional, sets the width of the page. Available options are 'default' or 'wide'.
+      Optional, sets the width of the page. Available options are 'narrow' or 'wide'.
     </st:attribute>
   </st:documentation>
 
@@ -78,8 +78,7 @@ THE SOFTWARE.
 
   <l:layout title="${pageTitle} - ${manageJenkinsAction.displayName}"
             permission="${attrs.permission}"
-            permissions="${attrs.permissions}"
-            type="${(newManageJenkins or attrs.includeSidepanel) ? 'two-column' : 'one-column'}">
+            permissions="${attrs.permissions}">
 
     <j:if test="${attrs.includeBreadcrumb}">
       <!-- Hacky - this will be improved in subsequent PRs -->
@@ -120,23 +119,19 @@ THE SOFTWARE.
             </j:forEach>
           </l:tasks>
         </l:side-panel>
-        <l:main-panel>
-          <div class="app-settings-container">
-            <div class="app-settings-container__inner ${attrs.width eq 'wide' ? 'app-settings-container__inner--wide' : ''}">
-              <j:if test="${!attrs.containsKey('header')}">
-                <l:app-bar title="${pageTitle}" />
-                <j:if test="${!empty(description)}">
-                  <div class="jenkins-page-description">
-                    ${description}
-                  </div>
-                </j:if>
-              </j:if>
+        <l:main-panel width="${attrs.width ?: 'narrow'}">
+          <j:if test="${!attrs.containsKey('header')}">
+            <l:app-bar title="${pageTitle}" />
+            <j:if test="${!empty(description)}">
+              <div class="jenkins-page-description">
+                ${description}
+              </div>
+            </j:if>
+          </j:if>
 
-              <j:out value="${attrs.header}" />
+          <j:out value="${attrs.header}" />
 
-              <d:invokeBody />
-            </div>
-          </div>
+          <d:invokeBody />
         </l:main-panel>
       </j:when>
       <j:otherwise>
@@ -144,7 +139,7 @@ THE SOFTWARE.
           <st:include page="sidepanel" />
         </j:if>
 
-        <l:main-panel>
+        <l:main-panel width="${attrs.width ?: 'narrow'}">
           <j:if test="${!attrs.containsKey('header')}">
             <l:app-bar title="${pageTitle}" />
             <j:if test="${!empty(description)}">
diff --git a/core/src/main/resources/lib/layout/side-panel.jelly b/core/src/main/resources/lib/layout/side-panel.jelly
index 02afd6e7ba..6972c1efc2 100644
--- a/core/src/main/resources/lib/layout/side-panel.jelly
+++ b/core/src/main/resources/lib/layout/side-panel.jelly
@@ -26,17 +26,11 @@ THE SOFTWARE.
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define">
   <st:documentation>
     Generates a left side content as part of a Jenkins page. Typically known as two-column or left-side +  main-content layouts
-    <st:attribute name="sticky">
-      Make the side panel sticky. Should not be used on pages that include widgets in the sidepanel and when plugins can
-      add their own tasks, so the number of tasks is not fixed.
-    </st:attribute>
-
   </st:documentation>
 
   <j:if test="${mode=='side-panel'}">
-    <div id="side-panel" class="app-page-body__sidebar ${attrs.sticky == 'true' ? 'app-page-body__sidebar--sticky' : ''}">
+    <div id="side-panel" class="app-page-body__sidebar">
       <d:invokeBody />
     </div>
   </j:if>
-
 </j:jelly>
diff --git a/src/main/js/components/header/index.js b/src/main/js/components/header/index.js
index 695f5058e9..b63e971a50 100644
--- a/src/main/js/components/header/index.js
+++ b/src/main/js/components/header/index.js
@@ -17,44 +17,9 @@ function init() {
     computeOverflow();
   });
 
-  // Fade in the page header on scroll, increasing opacity and intensity of the backdrop blur
-  window.addEventListener("scroll", () => {
-    const navigation = document.querySelector("#page-header");
-    const scrollY = Math.max(0, window.scrollY);
-    navigation.style.setProperty(
-      "--background-opacity",
-      Math.min(70, scrollY) + "%",
-    );
-    navigation.style.setProperty(
-      "--background-blur",
-      Math.min(40, scrollY) + "px",
-    );
-    if (
-      !document.querySelector("#main-panel > .jenkins-search--app-bar") &&
-      !document.querySelector(".app-page-body__sidebar--sticky")
-    ) {
-      const prefersContrast = window.matchMedia(
-        "(prefers-contrast: more)",
-      ).matches;
-      navigation.style.setProperty(
-        "--border-opacity",
-        Math.min(
-          prefersContrast ? 100 : 15,
-          prefersContrast ? scrollY * 3 : scrollY,
-        ) + "%",
-      );
-    }
-  });
-
   window.addEventListener("load", () => {
     // We can't use :has due to HtmlUnit CSS Parser not supporting it, so
     // these are workarounds for that same behaviour
-    if (document.querySelector("#main-panel > .jenkins-app-bar--sticky")) {
-      document
-        .querySelector(".jenkins-header")
-        .classList.add("jenkins-header--has-sticky-app-bar");
-    }
-
     if (!document.querySelector(".jenkins-breadcrumbs__list-item")) {
       document
         .querySelector(".jenkins-header")
diff --git a/src/main/scss/abstracts/_theme.scss b/src/main/scss/abstracts/_theme.scss
index 7dc2ae2873..b7ff9d14a1 100644
--- a/src/main/scss/abstracts/_theme.scss
+++ b/src/main/scss/abstracts/_theme.scss
@@ -78,11 +78,21 @@ $semantics: (
   // Background colors
   --background: rgb(254 254 254);
 
+  // Body
+  --body-background-top: color-mix(
+    in oklch,
+    white 1.5%,
+    var(--card-background)
+  );
+
   // Header
-  --header-background: var(--background);
-  --header-border: var(--text-color-secondary);
+  --header-background: color-mix(
+    in sRGB,
+    var(--background),
+    var(--text-color-secondary) 2.5%
+  );
   --header-color: var(--text-color);
-  --header-height: 4.125rem;
+  --header-height: 3.5rem;
 
   // App bar
   --bottom-app-bar-padding: 0.875rem;
@@ -152,7 +162,6 @@ $semantics: (
     var(--jenkins-border-color--subtle);
 
   @media (prefers-contrast: more) {
-    --header-border: var(--text-color);
     --focus-input-border: var(--text-color);
     --jenkins-border-color: var(--text-color);
     --jenkins-border-color--subtle: var(--text-color);
@@ -268,7 +277,7 @@ $semantics: (
   --panel-border-color: var(--light-grey);
 
   // Form
-  --section-padding: 1.625rem;
+  --section-padding: 1.25rem;
   --input-color: var(--white);
   --input-border: color-mix(
     in sRGB,
@@ -285,7 +294,7 @@ $semantics: (
   --form-item-max-width--small: min(35vw, 1200px);
 
   @media screen and (max-width: breakpoints.$tablet-breakpoint) {
-    --section-padding: 1.25rem;
+    --section-padding: 1rem;
     --form-item-max-width: 100%;
     --form-item-max-width--medium: 100%;
     --form-item-max-width--small: 100%;
@@ -293,7 +302,7 @@ $semantics: (
 
   --form-label-font-weight: var(--font-bold-weight);
   --form-input-padding: 0.5rem 0.625rem;
-  --form-input-border-radius: 0.625rem;
+  --form-input-border-radius: 0.6875rem;
   --form-input-glow: 0 0 0 0.5rem transparent;
   --form-input-glow--focus: 0 0 0 0.25rem var(--focus-input-glow);
   --pre-background: var(--button-background);
diff --git a/src/main/scss/base/_core.scss b/src/main/scss/base/_core.scss
index 7cbad0dd53..5ed25b7d16 100644
--- a/src/main/scss/base/_core.scss
+++ b/src/main/scss/base/_core.scss
@@ -1,9 +1,9 @@
 html {
-  height: 100%;
   box-sizing: border-box;
   -webkit-tap-highlight-color: transparent;
   color: var(--text-color);
   scroll-padding-top: calc(var(--header-height) + var(--section-padding));
+  overscroll-behavior: none;
   scrollbar-color: oklch(from var(--text-color-secondary) l c h / 0.35)
     oklch(from var(--text-color-secondary) l c h / 0.05);
 }
@@ -13,7 +13,8 @@ body {
   min-height: 100vh;
   display: flex;
   flex-direction: column;
-  background-color: var(--background);
+  background: var(--header-background);
+  background-attachment: fixed;
 }
 
 *,
diff --git a/src/main/scss/base/_layout-commons.scss b/src/main/scss/base/_layout-commons.scss
index 7c5060bc3d..ba653a9cfa 100644
--- a/src/main/scss/base/_layout-commons.scss
+++ b/src/main/scss/base/_layout-commons.scss
@@ -1,112 +1,194 @@
 @use "../base/breakpoints";
 
-/* -------------------------------------- */
-
 .app-page-body {
-  display: flex;
-  justify-content: flex-start;
+  position: relative;
+  display: grid;
   align-items: stretch;
-  flex: 1 0 auto;
-}
+  border: 1px solid transparent;
+  margin-inline: var(--page-inset);
+  isolation: isolate;
+  flex-grow: 1;
 
-.app-page-body__sidebar {
-  @media (min-width: breakpoints.$tablet-breakpoint) {
-    &--sticky {
-      position: sticky;
-      top: var(--header-height);
-      align-self: flex-start;
+  &:has(> .app-page-body__sidebar) {
+    grid-template-columns: auto 1fr;
+  }
+
+  @media (width < 740px) {
+    display: flex;
+    flex-direction: column;
+  }
+
+  & > .app-page-body__sidebar {
+    padding: var(--section-padding);
+
+    @media (width >= 740px) {
+      width: 280px;
+
+      &:not(:has(.pane, .jenkins-card)) {
+        position: sticky;
+        top: calc(var(--header-height) + var(--jenkins-border-width));
+        height: calc(100vh - var(--header-height) - var(--page-inset));
+        overflow-y: auto;
+        border-right: var(--jenkins-border);
+      }
+    }
+
+    @media (width > breakpoints.$tablet-breakpoint) {
+      width: 320px;
+    }
+  }
+
+  & > .app-page-body__contents {
+    padding: var(--section-padding);
+    padding-bottom: 0;
+  }
+
+  // Remove this when sidepanels no longer contain widgets
+  &:has(#side-panel .pane, #side-panel .jenkins-card) {
+    & > .app-page-body__sidebar {
+      padding-right: 0;
+
+      #tasks {
+        margin-bottom: 1rem;
+      }
+
+      .jenkins-card,
+      .pane-frame {
+        margin-inline: -0.5rem;
+      }
     }
   }
 }
 
+.app-main-panel {
+  margin-bottom: var(--section-padding);
+
+  &--narrow {
+    max-width: 900px;
+    margin-inline: auto;
+  }
+
+  &--wide {
+    width: 70vw;
+    max-width: 1700px;
+    margin-inline: auto;
+  }
+}
+
+.app-full-screen-page-body {
+  display: flex;
+  flex-direction: column;
+  flex-grow: 1;
+
+  & > .app-page-body__contents {
+    display: flex;
+    flex-direction: column;
+    flex-grow: 1;
+    min-height: 0;
+  }
+
+  .app-main-panel {
+    display: flex;
+    flex-direction: column;
+    flex-grow: 1;
+    min-height: 0;
+    margin-bottom: 0;
+  }
+}
+
+// Page frame
+.app-page-frame__background {
+  position: relative;
+  pointer-events: none;
+
+  &::before,
+  &::after {
+    content: "";
+    position: fixed;
+    inset: var(--header-height) var(--page-inset) var(--page-inset)
+      var(--page-inset);
+    border-radius: var(--form-input-border-radius);
+  }
+
+  &::before {
+    --background: var(--card-background);
+
+    background-color: var(--card-background);
+    background-image: linear-gradient(
+      in oklch,
+      var(--body-background-top),
+      var(--background)
+    );
+    background-size: 100% 90vh;
+    background-repeat: no-repeat;
+    z-index: -1;
+  }
+
+  &::after {
+    border: var(--jenkins-border);
+    z-index: 1;
+  }
+}
+
+.app-page-frame__mask {
+  position: fixed;
+  inset: 0;
+  z-index: 1;
+  pointer-events: none;
+  mask:
+    linear-gradient(#000 0 0),
+    linear-gradient(#000 0 0) left calc(var(--page-inset) + 1px) top
+      calc(var(--header-height) + 1px) /
+      calc(100% - calc(var(--page-inset) + 1px) * 2)
+      calc(
+        100% - calc(var(--header-height) + 1px) - calc(var(--page-inset) + 1px)
+      )
+      no-repeat;
+  mask-composite: exclude;
+
+  &::before {
+    content: "";
+    position: absolute;
+    inset: 0;
+    background: var(--header-background);
+    background-attachment: fixed;
+    opacity: 0.75;
+  }
+}
+
+.app-page-frame__blur {
+  position: fixed;
+  inset: 0;
+  z-index: 1;
+  pointer-events: none;
+
+  &::before,
+  &::after {
+    content: "";
+    position: absolute;
+    left: 0;
+    right: 0;
+    backdrop-filter: blur(15px);
+  }
+
+  &::before {
+    top: 0;
+    height: calc(var(--header-height) + var(--jenkins-border-width));
+  }
+
+  &::after {
+    bottom: 0;
+    height: var(--page-inset);
+  }
+}
+
+// Legacy
 #page-body.clear::after {
   clear: both;
   content: "";
   display: table;
 }
 
-#side-panel {
-  flex-shrink: 0;
-}
-
-#main-panel {
-  padding: 0 var(--section-padding) var(--section-padding)
-    var(--section-padding);
-  display: inline-block;
-  width: 100%;
-}
-
-.app-page-body--one-column {
-  --form-item-max-width: calc(85vw - 4rem);
-
-  @media screen and (width <= 1200px) {
-    --form-item-max-width: 100%;
-  }
-
-  max-width: 85vw;
-
-  #main-panel {
-    width: 100vw;
-  }
-
-  .jenkins-section {
-    max-width: unset;
-  }
-
-  @media (width <= 1200px) {
-    max-width: unset;
-  }
-
-  margin: auto;
-}
-
-body.two-column #main-panel {
-  width: calc(100% - var(--side-panel-width));
-  flex: 1;
-  display: block;
-}
-
-body.full-screen {
-  padding: 0;
-}
-
-body.full-screen #main-panel {
-  padding: 0;
-}
-
-body.two-column #side-panel {
-  width: var(--side-panel-width);
-}
-
-@media (max-width: breakpoints.$tablet-breakpoint) {
-  body.two-column #page-body {
-    flex-wrap: wrap;
-  }
-
-  body.two-column #side-panel {
-    width: 100%;
-    border-right: none;
-  }
-
-  body.two-column #main-panel {
-    margin-left: 0;
-    width: 100%;
-  }
-}
-
-.app-project-status-table {
-  width: 100%;
-  overflow-x: auto;
-}
-
-@media (width >= 1170px) {
-  body.two-column #main-panel {
-    width: calc(
-      100% - calc(var(--side-panel-width) + calc(var(--section-padding) * 2))
-    );
-  }
-}
-
 // Clearfixes extracted from responsive-grid.css as they essential
 .clearfix::before,
 .clearfix::after,
diff --git a/src/main/scss/base/_sticky.scss b/src/main/scss/base/_sticky.scss
index 43b1eb0f8e..d32b0bfd29 100644
--- a/src/main/scss/base/_sticky.scss
+++ b/src/main/scss/base/_sticky.scss
@@ -3,13 +3,19 @@
 // clicks.
 // Keep this list in sync with the `position: sticky` rules across the SCSS sources.
 :root[data-disable-sticky="true"] {
+  .app-page-frame__blur,
+  .app-page-frame__mask,
+  .app-page-frame__background {
+    display: none;
+  }
+
   .jenkins-header,
   .jenkins-app-bar--sticky,
   .jenkins-bottom-app-bar__shadow,
   .bottom-sticker,
   #bottom-sticker,
-  .app-page-body__sidebar--sticky,
-  .app-plugin-manager__sidebar {
+  .app-build-bar,
+  .app-page-body__sidebar {
     position: relative !important;
 
     // Reset the sticky offsets too — with relative positioning these would otherwise
@@ -19,6 +25,12 @@
     bottom: auto !important;
   }
 
+  // Don't allow for sidebar scrolling
+  .app-page-body__sidebar {
+    overflow-y: visible !important;
+    height: unset !important;
+  }
+
   // The bottom app bar shadow uses negative margins to overlap content; reset them so it
   // cannot intercept clicks when sticky positioning is disabled.
   .jenkins-bottom-app-bar__shadow {
diff --git a/src/main/scss/components/_app-bar.scss b/src/main/scss/components/_app-bar.scss
index ec6b35a389..50a9288b9e 100644
--- a/src/main/scss/components/_app-bar.scss
+++ b/src/main/scss/components/_app-bar.scss
@@ -3,7 +3,7 @@
   align-items: center;
   justify-content: space-between;
   margin-bottom: 0.875rem;
-  min-height: 2.875rem;
+  min-height: 2.5rem;
   gap: var(--section-padding);
   flex-wrap: wrap;
 
@@ -68,23 +68,23 @@
 
   &--sticky {
     position: sticky;
-    top: var(--header-height);
+    top: calc(var(--header-height) + 1.3125rem);
     z-index: 2;
 
     &::before,
     &::after {
       content: "";
       position: absolute;
-      inset: calc(var(--header-height) * -1)
+      inset: calc(var(--section-padding) * -1)
         calc(var(--section-padding) * -1) -0.875rem;
       z-index: -1;
       pointer-events: none;
     }
 
     &::before {
-      background: var(--background);
+      background: var(--body-background-top);
       mask-image: linear-gradient(black 70%, transparent);
-      opacity: 0.55;
+      opacity: 0.6;
     }
 
     &::after {
@@ -106,7 +106,8 @@
   h1,
   h2 {
     margin: 0;
-    font-size: 1.3125rem;
+    font-size: 1.1875rem;
+    font-weight: 550;
   }
 
   &__subtitle {
@@ -126,6 +127,7 @@
 }
 
 .jenkins-bottom-app-bar__shadow {
+  --background: var(--card-background);
   --semi-translucent: color-mix(in sRGB, var(--background) 70%, transparent);
 
   position: sticky;
diff --git a/src/main/scss/components/_breadcrumbs.scss b/src/main/scss/components/_breadcrumbs.scss
index 333eec8d5a..3e18a9187e 100644
--- a/src/main/scss/components/_breadcrumbs.scss
+++ b/src/main/scss/components/_breadcrumbs.scss
@@ -9,6 +9,7 @@
 
   &__list {
     display: flex;
+    margin: 0;
 
     & > * {
       z-index: 1;
diff --git a/src/main/scss/components/_page-footer.scss b/src/main/scss/components/_page-footer.scss
index a450bd0bd2..88e01c5524 100644
--- a/src/main/scss/components/_page-footer.scss
+++ b/src/main/scss/components/_page-footer.scss
@@ -6,10 +6,6 @@
   font-size: var(--font-size-sm);
 }
 
-.page-footer .container-fluid {
-  padding: 0;
-}
-
 .page-footer__flex-row {
   display: flex;
   align-items: stretch;
@@ -19,8 +15,6 @@
 .page-footer__flex-row > *:not(script) {
   display: flex;
   align-items: center;
-  padding: calc(var(--section-padding) / 2)
-    calc(var(--section-padding) - 0.85rem);
   gap: calc(var(--section-padding) / 2);
 }
 
@@ -32,16 +26,3 @@
 .page-footer span {
   display: inline-block;
 }
-
-.page-footer .jenkins-button {
-  transition: var(--standard-transition);
-
-  &:hover {
-    color: var(--text-color) !important;
-  }
-
-  svg,
-  .jenkins-overflow-button__ellipsis {
-    display: none;
-  }
-}
diff --git a/src/main/scss/components/_page-header.scss b/src/main/scss/components/_page-header.scss
index bad32ec98c..fe7377aca9 100644
--- a/src/main/scss/components/_page-header.scss
+++ b/src/main/scss/components/_page-header.scss
@@ -1,13 +1,9 @@
 @use "../abstracts/mixins";
 
 .jenkins-header {
-  --background-opacity: 0%;
-  --background-blur: 0;
-  --border-opacity: 0%;
-
   position: sticky;
   top: 0;
-  z-index: 999;
+  z-index: 2;
   display: flex;
   align-items: center;
   gap: var(--section-padding);
@@ -16,26 +12,6 @@
   min-height: var(--header-height);
   color: var(--header-color);
 
-  &::before {
-    content: "";
-    position: absolute;
-    inset: 0;
-    backdrop-filter: blur(var(--background-blur));
-    background: color-mix(
-      in sRGB,
-      var(--header-background) var(--background-opacity),
-      transparent
-    );
-    border-bottom: var(--jenkins-border-width) solid
-      color-mix(
-        in sRGB,
-        var(--header-border) var(--border-opacity),
-        transparent
-      );
-    background-clip: padding-box;
-    z-index: -1;
-  }
-
   .app-jenkins-logo {
     @include mixins.item($border: false);
 
@@ -79,7 +55,7 @@
     }
 
     #jenkins-head-icon {
-      width: 1.625rem;
+      width: 1.5rem;
     }
   }
 
@@ -91,11 +67,6 @@
     // For customizable-header-plugin
     color: inherit !important;
 
-    svg {
-      width: 1.25rem;
-      height: 1.25rem;
-    }
-
     img {
       width: 1.625rem;
       height: 1.625rem;
@@ -121,7 +92,7 @@
   &__main {
     display: grid;
     grid-template-columns: 1fr auto;
-    padding-left: var(--section-padding);
+    padding-left: calc(var(--section-padding) + var(--page-inset));
     width: 100%;
   }
 
@@ -135,14 +106,8 @@
     display: flex;
     align-items: center;
     justify-content: center;
-    gap: 0.5rem;
-    padding-right: var(--section-padding);
-  }
-
-  &--has-sticky-app-bar {
-    &::before {
-      mask-image: linear-gradient(black 50%, transparent);
-    }
+    gap: 0.25rem;
+    padding-right: calc(var(--section-padding) + var(--page-inset));
   }
 
   &--no-breadcrumbs {
diff --git a/src/main/scss/components/_side-panel-tasks.scss b/src/main/scss/components/_side-panel-tasks.scss
index 65cde1a935..ccf91ca756 100644
--- a/src/main/scss/components/_side-panel-tasks.scss
+++ b/src/main/scss/components/_side-panel-tasks.scss
@@ -1,19 +1,14 @@
 @use "../abstracts/mixins";
 @use "../base/breakpoints";
 
-$background-outset: 0.5rem;
+$inset: 0.6875rem;
 
 #tasks,
 .tasks,
 .subtasks {
   display: flex;
   flex-direction: column;
-  margin: 0 var(--section-padding) var(--section-padding) var(--section-padding);
   gap: 0.125rem;
-
-  @media (min-width: breakpoints.$tablet-breakpoint) {
-    margin-right: calc($background-outset);
-  }
 }
 
 .subtasks {
@@ -27,12 +22,11 @@ $background-outset: 0.5rem;
 
 #side-panel {
   .jenkins-app-bar {
-    margin-left: var(--section-padding);
-    margin-right: var(--section-padding);
+    margin-inline: $inset;
   }
 
   & > #tasks > .jenkins-search-container {
-    margin: 0 0 1rem #{-$background-outset};
+    margin: 0 0 1rem;
 
     .jenkins-search__icon {
       width: 2.625rem;
@@ -45,10 +39,6 @@ $background-outset: 0.5rem;
   }
 }
 
-#tasks .task {
-  margin: 0 0 0 calc($background-outset * -1);
-}
-
 #tasks,
 .tasks {
   .task .task-link {
@@ -57,7 +47,7 @@ $background-outset: 0.5rem;
     display: flex;
     align-items: center;
     justify-content: flex-start;
-    padding: 0.5rem 0.6875rem;
+    padding: 0.5rem $inset;
     gap: 0.625rem;
     width: 100%;
     font-size: var(--font-size-sm);
@@ -115,7 +105,7 @@ $background-outset: 0.5rem;
   font-size: var(--font-size-sm);
   color: var(--text-color-secondary);
   font-weight: var(--font-bold-weight);
-  margin: 1rem 0 0.375rem;
+  margin: 1rem 0 0.375rem $inset;
 
   &:first-of-type {
     margin-top: 0.375rem;
diff --git a/src/main/scss/components/_side-panel-widgets.scss b/src/main/scss/components/_side-panel-widgets.scss
index 91feb2e0d6..abd46f7077 100644
--- a/src/main/scss/components/_side-panel-widgets.scss
+++ b/src/main/scss/components/_side-panel-widgets.scss
@@ -8,10 +8,6 @@
   overflow: hidden;
 }
 
-#side-panel .pane-frame {
-  margin-left: 10px;
-}
-
 #side-panel .pane-header,
 .app-build-content .pane-header {
   font-size: var(--font-size-sm);
diff --git a/src/main/scss/pages/_build.scss b/src/main/scss/pages/_build.scss
index 9c8fe52b7f..434beab29f 100644
--- a/src/main/scss/pages/_build.scss
+++ b/src/main/scss/pages/_build.scss
@@ -12,7 +12,6 @@
 
 .app-build__grid {
   gap: calc(var(--section-padding) / 2);
-  margin-bottom: calc(var(--section-padding) * -0.5);
 
   & > * {
     height: 350px;
@@ -139,101 +138,74 @@
   }
 }
 
-body:has(.app-build-bar),
-body:has(.app-settings-container) {
-  --top: color-mix(in sRGB, var(--text-color-secondary) 4%, var(--background));
-  --bottom: color-mix(
-    in sRGB,
-    var(--text-color-secondary) 2%,
-    var(--background)
-  );
+@keyframes app-build-bar-border-on-scroll {
+  from {
+    border-bottom-color: color-mix(
+      in sRGB,
+      var(--jenkins-border-color),
+      transparent
+    );
+  }
 
-  background: linear-gradient(var(--top), var(--bottom));
-  background-attachment: fixed;
-}
-
-.app-settings-container {
-  --background: var(--card-background);
-  --top: color-mix(
-    in sRGB,
-    var(--text-color-secondary) 2%,
-    var(--card-background)
-  );
-
-  position: relative;
-  background-color: var(--card-background);
-  background-image: linear-gradient(var(--top), var(--card-background));
-  background-size: 100% 90vh;
-  background-repeat: no-repeat;
-  border: var(--jenkins-border);
-  border-radius: var(--form-input-border-radius);
-  z-index: 0;
-  min-height: calc(100vh - var(--header-height) - var(--section-padding));
-
-  &__inner {
-    max-width: 900px;
-    margin: auto;
-    padding: var(--section-padding);
-    display: flex;
-    flex-direction: column;
-
-    &--wide {
-      width: 70vw;
-      max-width: 1700px;
-    }
-
-    // TODO - this can be moved to app-bar.scss when Manage Jenkins flag is removed
-    .jenkins-app-bar--sticky {
-      padding: var(--section-padding) 0 !important;
-      margin: -1rem 0 0.5rem !important;
-
-      &::before,
-      &::after {
-        inset: 0 !important;
-      }
-
-      &::before {
-        background: color-mix(
-          in sRGB,
-          var(--text-color-secondary) 2%,
-          var(--card-background)
-        ) !important;
-        mask-image: linear-gradient(black 60%, transparent) !important;
-        opacity: 0.75 !important;
-      }
-
-      &::after {
-        left: calc(var(--section-padding) * -1) !important;
-        right: calc(var(--section-padding) * -1) !important;
-        mask-image: linear-gradient(black 65%, transparent) !important;
-      }
-    }
+  to {
+    border-bottom-color: var(--jenkins-border-color);
   }
 }
 
 .app-build-bar {
-  position: relative;
+  --app-build-bar-border-color: color-mix(
+    in sRGB,
+    var(--jenkins-border-color),
+    transparent
+  );
+
+  position: sticky;
+  top: calc(var(--header-height) + var(--jenkins-border-width));
   display: grid;
   grid-template-columns: 1fr auto 1fr;
-  align-items: start;
+  align-items: center;
   gap: 0.5rem 1.5rem;
-  min-height: 2.875rem;
-  margin-top: -5px;
-  padding-bottom: 0.75rem;
+  min-height: var(--header-height);
+  background-color: color-mix(
+    in oklch,
+    transparent 25%,
+    var(--body-background-top)
+  );
+  padding-inline: var(--section-padding);
   z-index: 102;
-
-  @media (width <= 1200px) {
-    display: flex;
-    flex-direction: column;
-  }
+  border-bottom: var(--jenkins-border-width) solid
+    var(--app-build-bar-border-color);
+  margin-left: calc(var(--section-padding) * -1);
+  margin-right: calc(var(--section-padding) * -1);
+  border-top-left-radius: var(--form-input-border-radius);
+  border-top-right-radius: var(--form-input-border-radius);
 
   &::before {
     content: "";
     position: absolute;
-    inset: -1000px calc(var(--section-padding) * -1) 0;
-    background-color: var(--background);
-    border-bottom: var(--jenkins-border-width) solid var(--card-border-color);
+    inset: 0;
     z-index: -1;
+    pointer-events: none;
+    backdrop-filter: blur(15px);
+    border-radius: inherit;
+  }
+
+  @supports (animation-timeline: scroll()) {
+    animation-name: app-build-bar-border-on-scroll;
+    animation-duration: 1s;
+    animation-fill-mode: both;
+    animation-timing-function: linear;
+    animation-timeline: scroll(nearest block);
+    animation-range: 0 var(--header-height);
+  }
+
+  @media (width < 740px) {
+    position: relative;
+    display: flex;
+    flex-direction: column;
+    align-items: start;
+    padding-block: var(--section-padding);
+    top: 0;
   }
 
   .app-build-bar__content {
@@ -247,6 +219,7 @@ body:has(.app-settings-container) {
     display: inline-flex;
     align-items: center;
     justify-content: center;
+    margin-block: 0.5rem;
   }
 
   .app-build-bar__controls {
@@ -254,7 +227,7 @@ body:has(.app-settings-container) {
     align-items: center;
     justify-content: end;
     flex: 1;
-    gap: 0.75rem;
+    gap: 0.5rem;
 
     @media (width <= 600px) {
       justify-content: stretch;
@@ -278,12 +251,14 @@ body:has(.app-settings-container) {
     svg {
       width: 2rem;
       height: 2rem;
+      flex-shrink: 0;
     }
   }
 
   h1 {
     margin-bottom: 0;
-    font-size: 1.25rem;
+    font-size: 1.1875rem;
+    font-weight: 550;
   }
 
   .jenkins-button {
@@ -325,6 +300,10 @@ body:has(.app-settings-container) {
   }
 }
 
+.app-page-body__contents:has(.app-build-bar) {
+  padding-top: 0;
+}
+
 .app-build-content {
   display: flex;
   flex-direction: column;
diff --git a/src/main/scss/pages/_job.scss b/src/main/scss/pages/_job.scss
index 34732c7df1..44b9ee0ce7 100644
--- a/src/main/scss/pages/_job.scss
+++ b/src/main/scss/pages/_job.scss
@@ -1,11 +1,5 @@
 @use "../abstracts/mixins";
 
-#side-panel {
-  #buildHistoryPage {
-    margin: 10px 0 10px 10px;
-  }
-}
-
 #buildHistoryPage {
   .jenkins-search {
     margin-inline: -0.25rem;
diff --git a/src/main/scss/pages/_plugin-manager.scss b/src/main/scss/pages/_plugin-manager.scss
index a1b23e7831..f4601d8255 100644
--- a/src/main/scss/pages/_plugin-manager.scss
+++ b/src/main/scss/pages/_plugin-manager.scss
@@ -104,13 +104,3 @@
     border-radius: 0.25em;
   }
 }
-
-.app-plugin-manager__sidebar {
-  position: sticky;
-  top: calc(40px + 1.6rem);
-
-  h1 {
-    margin-top: 1rem !important;
-    margin-bottom: 0.1rem !important;
-  }
-}
diff --git a/test/src/test/java/jenkins/model/ErrorPageTest.java b/test/src/test/java/jenkins/model/ErrorPageTest.java
index 51a76827e3..69897cadbc 100644
--- a/test/src/test/java/jenkins/model/ErrorPageTest.java
+++ b/test/src/test/java/jenkins/model/ErrorPageTest.java
@@ -57,7 +57,6 @@ class ErrorPageTest {
                 final String content = ex.getResponse().getContentAsString(StandardCharsets.UTF_8);
                 assertThat(content, not(containsString(j.contextPath + "/login?from=")));
                 assertThat(content, containsString("This page does not exist."));
-                assertThat(content, not(containsString("REST API")));
             }
 
             { // paths are fine on error page even when nested
@@ -66,7 +65,6 @@ class ErrorPageTest {
                 final String content = ex.getResponse().getContentAsString(StandardCharsets.UTF_8);
                 assertThat(content, not(containsString(j.contextPath + "/login?from=")));
                 assertThat(content, containsString("This page does not exist."));
-                assertThat(content, not(containsString("REST API")));
             }
 
             { // resource root action have custom (less) error message content
@@ -76,7 +74,6 @@ class ErrorPageTest {
                 assertThat(content, not(containsString(j.contextPath + "/login?from=")));
                 assertThat(content, not(containsString("This page does not exist.")));
                 assertThat(content, not(containsString("This page may not exist, or you may not have permission to see it.")));
-                assertThat(content, not(containsString("REST API")));
             }
 
             /* Set up security realm and request as anonymous, we expect login link and hedged response */
@@ -90,7 +87,6 @@ class ErrorPageTest {
                 assertThat(content, containsString(j.contextPath + "/login?from=" + j.contextPath.replace("/", "%2F") + "%2Ffoo"));
                 assertThat(content, not(containsString(j.contextPath + "/login?from=" + j.contextPath.replace("/", "%2F") + "%2F404")));
                 assertThat(content, containsString("This page may not exist, or you may not have permission to see it."));
-                assertThat(content, not(containsString("REST API")));
             }
 
             { // paths are fine on error page even when nested
@@ -100,7 +96,6 @@ class ErrorPageTest {
                 assertThat(content, containsString(j.contextPath + "/login?from=" + j.contextPath.replace("/", "%2F") + "%2Ffoo%2Fbar%2Fbaz%2F"));
                 assertThat(content, not(containsString(j.contextPath + "/login?from=" + j.contextPath.replace("/", "%2F") + "%2F404")));
                 assertThat(content, containsString("This page may not exist, or you may not have permission to see it."));
-                assertThat(content, not(containsString("REST API")));
             }
 
             { // resource root action have custom (less) error message content
@@ -111,7 +106,6 @@ class ErrorPageTest {
                 assertThat(content, not(containsString(j.contextPath + "/login?from=" + j.contextPath.replace("/", "%2F") + "%2F404")));
                 assertThat(content, not(containsString("This page does not exist.")));
                 assertThat(content, not(containsString("This page may not exist, or you may not have permission to see it.")));
-                assertThat(content, not(containsString("REST API")));
             }
 
             /* With the security realm still set up, log in and expect the profile link to show */
@@ -124,7 +118,6 @@ class ErrorPageTest {
                 assertThat(content, not(containsString(j.contextPath + "/login?from=")));
                 assertThat(content, containsString("user/alice"));
                 assertThat(content, containsString("This page may not exist, or you may not have permission to see it."));
-                assertThat(content, not(containsString("REST API")));
             }
 
             { // paths are fine on error page even when nested
@@ -134,7 +127,6 @@ class ErrorPageTest {
                 assertThat(content, not(containsString(j.contextPath + "/login?from=")));
                 assertThat(content, containsString("user/alice"));
                 assertThat(content, containsString("This page may not exist, or you may not have permission to see it."));
-                assertThat(content, not(containsString("REST API")));
             }
 
             { // resource root action have custom (less) error message content
@@ -145,7 +137,6 @@ class ErrorPageTest {
                 assertThat(content, containsString("user/alice"));
                 assertThat(content, not(containsString("This page does not exist.")));
                 assertThat(content, not(containsString("This page may not exist, or you may not have permission to see it.")));
-                assertThat(content, not(containsString("REST API")));
             }
         } finally {
             Dispatcher.TRACE = true;
@@ -176,13 +167,11 @@ class ErrorPageTest {
             final String content = page.getWebResponse().getContentAsString(StandardCharsets.UTF_8);
             assertThat(content, containsString("Back to Jenkins"));
             assertThat(content, containsString("Jenkins serves only static files on this domain."));
-            assertThat(content, not(containsString("REST API")));
             if (page.isHtmlPage()) {
                 final HtmlPage htmlPage = (HtmlPage) page;
                 final Page nextPage = htmlPage.getAnchorByText("Back to Jenkins").click();
                 final String nextContent = nextPage.getWebResponse().getContentAsString(StandardCharsets.UTF_8);
                 assertThat(nextContent, containsString("Welcome to Jenkins"));
-                assertThat(nextContent, containsString("REST API")); // Rest API exists for Jenkins main page
             }
         }
     }