diff --git a/src/browser/CdpCaptureEventHandlers.ts b/src/browser/CdpCaptureEventHandlers.ts
index 8587393fcc..1823fe06c0 100644
--- a/src/browser/CdpCaptureEventHandlers.ts
+++ b/src/browser/CdpCaptureEventHandlers.ts
@@ -11,6 +11,7 @@ import { WEB_RUNTIME_LIMITS } from "../domain/webRuntime.js";
 import { safeResponseMetadata } from "./CdpSafeMetadata.js";
 import {
   allowedSanitizedUrl,
+  executionContextKey,
   isHttpUrl,
   numberValue,
   admitRecords,
@@ -27,7 +28,6 @@ import {
 import {
   consolePrimitive,
   exclusionReasonForUrl,
-  executionContextKey,
   initiatorLocation,
   integerOrNull,
   isJsonMediaType,
@@ -46,15 +46,9 @@ export const handleExecutionContextCreated = (
   params: UnknownRecord,
 ): void => {
   const context = recordValue(params.context);
-  const identifier = numberValue(context?.id);
+  const key = executionContextKey(context?.id);
   const frameId = cdpStringValue(recordValue(context?.auxData)?.frameId);
-  if (
-    identifier === undefined ||
-    !Number.isSafeInteger(identifier) ||
-    frameId === undefined
-  )
-    return;
-  const key = String(identifier);
+  if (key === null || frameId === undefined) return;
   // New contexts may reuse an id. Scripts already parsed keep the frame stored on them.
   state.executionContextFrames.set(key, frameId);
 };
diff --git a/src/browser/CdpCaptureEventHelpers.ts b/src/browser/CdpCaptureEventHelpers.ts
index ca131b4481..6dab382c90 100644
--- a/src/browser/CdpCaptureEventHelpers.ts
+++ b/src/browser/CdpCaptureEventHelpers.ts
@@ -202,13 +202,6 @@ export const integerOrNull = (value: unknown): number | null => {
   return number === undefined ? null : Math.max(0, Math.trunc(number));
 };
 
-export const executionContextKey = (value: unknown): string | null => {
-  const identifier = numberValue(value);
-  return identifier !== undefined && Number.isSafeInteger(identifier)
-    ? String(identifier)
-    : null;
-};
-
 export const isJsonContentType = (
   headers: UnknownRecord | undefined,
 ): boolean => {
diff --git a/src/browser/CdpCaptureValues.ts b/src/browser/CdpCaptureValues.ts
index 713df21e42..580dca0444 100644
--- a/src/browser/CdpCaptureValues.ts
+++ b/src/browser/CdpCaptureValues.ts
@@ -31,6 +31,13 @@ export const cdpStringValue = (value: unknown): string | undefined =>
 export const numberValue = (value: unknown): number | undefined =>
   typeof value === "number" && Number.isFinite(value) ? value : undefined;
 
+export const executionContextKey = (value: unknown): string | null => {
+  const identifier = numberValue(value);
+  return identifier !== undefined && Number.isSafeInteger(identifier)
+    ? String(identifier)
+    : null;
+};
+
 /** An omitted resource size is unknown; a supplied invalid size is malformed. */
 export const resourceContentSize = (
   value: unknown,
diff --git a/src/browser/CdpElectronScriptEvents.ts b/src/browser/CdpElectronScriptEvents.ts
index 8461bed8bc..5b982dae86 100644
--- a/src/browser/CdpElectronScriptEvents.ts
+++ b/src/browser/CdpElectronScriptEvents.ts
@@ -4,7 +4,7 @@ import { jsonValueByteLength } from "../domain/jsonValueByteLength.js";
 import { CDP_CAPTURE_SCRIPT_METADATA_LIMITS } from "./CdpCaptureEventTypes.js";
 import { CdpCaptureCompleteness } from "./CdpCaptureCompleteness.js";
 import {
-  numberValue,
+  executionContextKey,
   recordValue,
   scriptMetadataValues,
   cdpStringValue,
@@ -129,10 +129,3 @@ const retainExecutionContext = (
   if (contextKey === null || frameId === undefined || frameId === "") return;
   frames.set(contextKey, frameId);
 };
-
-const executionContextKey = (value: unknown): string | null => {
-  const identifier = numberValue(value);
-  return identifier !== undefined && Number.isSafeInteger(identifier)
-    ? String(identifier)
-    : null;
-};
diff --git a/src/inspector/V8InspectorProvider.ts b/src/inspector/V8InspectorProvider.ts
index 01e3383a32..38165e151d 100644
--- a/src/inspector/V8InspectorProvider.ts
+++ b/src/inspector/V8InspectorProvider.ts
@@ -24,7 +24,7 @@ import { analysisErrorWithCleanupFailure } from "../domain/analysisErrorCleanup.
 import type { BrowserObservationOperation } from "../domain/browserObservationErrors.js";
 import { err, ok, type Result } from "../domain/result.js";
 import {
-  numberValue,
+  executionContextKey,
   recordValue,
   cdpStringValue,
   scriptMetadataValues,
@@ -651,7 +651,7 @@ const ingestScript = (event: CdpEvent, state: CaptureState): void => {
   const metadata = scriptMetadataValues(value);
   const draft: ScriptDraft = {
     rawUrl,
-    executionContextKey: contextKey(value?.executionContextId),
+    executionContextKey: executionContextKey(value?.executionContextId),
     cdpHash: metadata.hash,
     length: metadata.length,
     isModule: metadata.isModule,
@@ -680,7 +680,7 @@ const ingestContext = (event: CdpEvent, state: CaptureState): void => {
     event.method === "Runtime.executionContextCreated"
       ? recordValue(parameters?.context)
       : parameters;
-  const key = contextKey(
+  const key = executionContextKey(
     event.method === "Runtime.executionContextCreated"
       ? runtimeContext?.id
       : runtimeContext?.executionContextId,
@@ -778,13 +778,6 @@ const retainedMetadataBytes = (value: ScriptDraft | ContextDraft): number => {
   );
 };
 
-const contextKey = (value: unknown): string | null => {
-  const identifier = numberValue(value);
-  return identifier !== undefined && Number.isSafeInteger(identifier)
-    ? String(identifier)
-    : null;
-};
-
 const providerError = (
   cause: unknown,
   operation: BrowserObservationOperation,