diff --git a/apps/browser/src/autofill/fido2/background/abstractions/fido2.background.ts b/apps/browser/src/autofill/fido2/background/abstractions/fido2.background.ts
index b341be28eb..6ad069ad56 100644
--- a/apps/browser/src/autofill/fido2/background/abstractions/fido2.background.ts
+++ b/apps/browser/src/autofill/fido2/background/abstractions/fido2.background.ts
@@ -13,7 +13,6 @@ type SharedFido2ScriptRegistrationOptions = SharedFido2ScriptInjectionDetails &
   matches: string[];
   excludeMatches: string[];
   allFrames: true;
-  world?: "MAIN" | "ISOLATED";
 };
 
 type Fido2ExtensionMessage = {
diff --git a/apps/browser/src/autofill/fido2/background/fido2.background.spec.ts b/apps/browser/src/autofill/fido2/background/fido2.background.spec.ts
index 76ad78a6cd..752851b3d3 100644
--- a/apps/browser/src/autofill/fido2/background/fido2.background.spec.ts
+++ b/apps/browser/src/autofill/fido2/background/fido2.background.spec.ts
@@ -203,7 +203,6 @@ describe("Fido2Background", () => {
             { file: Fido2ContentScript.PageScriptDelayAppend },
             { file: Fido2ContentScript.ContentScript },
           ],
-          world: "ISOLATED",
           ...sharedRegistrationOptions,
         });
       });
diff --git a/apps/browser/src/autofill/fido2/background/fido2.background.ts b/apps/browser/src/autofill/fido2/background/fido2.background.ts
index 0ee7a43767..22ee4a1822 100644
--- a/apps/browser/src/autofill/fido2/background/fido2.background.ts
+++ b/apps/browser/src/autofill/fido2/background/fido2.background.ts
@@ -176,7 +176,6 @@ export class Fido2Background implements Fido2BackgroundInterface {
         { file: await this.getFido2PageScriptAppendFileName() },
         { file: Fido2ContentScript.ContentScript },
       ],
-      world: "ISOLATED",
       ...this.sharedRegistrationOptions,
     });
   }
diff --git a/apps/browser/src/autofill/fido2/content/fido2-page-script-append.mv2.spec.ts b/apps/browser/src/autofill/fido2/content/fido2-page-script-append.mv2.spec.ts
index 0b10841e39..b444c96708 100644
--- a/apps/browser/src/autofill/fido2/content/fido2-page-script-append.mv2.spec.ts
+++ b/apps/browser/src/autofill/fido2/content/fido2-page-script-append.mv2.spec.ts
@@ -29,48 +29,38 @@ describe("FIDO2 page-script for manifest v2", () => {
     expect(window.document.createElement).not.toHaveBeenCalled();
   });
 
-  it("appends the `page-script.js` file to the document head when the contentType is `text/html`", async () => {
-    const scriptContents = "test-script-contents";
+  it("appends the `page-script.js` file to the document head when the contentType is `text/html`", () => {
     jest.spyOn(window.document.head, "prepend").mockImplementation((node) => {
       createdScriptElement = node as HTMLScriptElement;
       return node;
     });
-    window.fetch = jest.fn().mockResolvedValue({
-      text: () => Promise.resolve(scriptContents),
-    } as Response);
 
     // FIXME: Remove when updating file. Eslint update
     // eslint-disable-next-line @typescript-eslint/no-require-imports
     require("./fido2-page-script-delay-append.mv2.ts");
-    await jest.runAllTimersAsync();
 
     expect(window.document.createElement).toHaveBeenCalledWith("script");
     expect(chrome.runtime.getURL).toHaveBeenCalledWith(Fido2ContentScript.PageScript);
     expect(window.document.head.prepend).toHaveBeenCalledWith(expect.any(HTMLScriptElement));
-    expect(createdScriptElement.innerHTML).toBe(scriptContents);
+    expect(createdScriptElement.src).toBe(`chrome-extension://id/${Fido2ContentScript.PageScript}`);
   });
 
-  it("appends the `page-script.js` file to the document element if the head is not available", async () => {
-    const scriptContents = "test-script-contents";
+  it("appends the `page-script.js` file to the document element if the head is not available", () => {
     window.document.documentElement.removeChild(window.document.head);
     jest.spyOn(window.document.documentElement, "prepend").mockImplementation((node) => {
       createdScriptElement = node as HTMLScriptElement;
       return node;
     });
-    window.fetch = jest.fn().mockResolvedValue({
-      text: () => Promise.resolve(scriptContents),
-    } as Response);
 
     // FIXME: Remove when updating file. Eslint update
     // eslint-disable-next-line @typescript-eslint/no-require-imports
     require("./fido2-page-script-delay-append.mv2.ts");
-    await jest.runAllTimersAsync();
 
     expect(window.document.createElement).toHaveBeenCalledWith("script");
     expect(chrome.runtime.getURL).toHaveBeenCalledWith(Fido2ContentScript.PageScript);
     expect(window.document.documentElement.prepend).toHaveBeenCalledWith(
       expect.any(HTMLScriptElement),
     );
-    expect(createdScriptElement.innerHTML).toBe(scriptContents);
+    expect(createdScriptElement.src).toBe(`chrome-extension://id/${Fido2ContentScript.PageScript}`);
   });
 });
diff --git a/apps/browser/src/autofill/fido2/content/fido2-page-script-delay-append.mv2.ts b/apps/browser/src/autofill/fido2/content/fido2-page-script-delay-append.mv2.ts
index 8c0d17c7e2..ffa6f7051c 100644
--- a/apps/browser/src/autofill/fido2/content/fido2-page-script-delay-append.mv2.ts
+++ b/apps/browser/src/autofill/fido2/content/fido2-page-script-delay-append.mv2.ts
@@ -2,26 +2,17 @@
  * This script handles injection of the FIDO2 override page script into the document.
  * This is required for manifest v2, but will be removed when we migrate fully to manifest v3.
  */
-void (async function (globalContext) {
+(function (globalContext) {
   if (globalContext.document.contentType !== "text/html") {
     return;
   }
 
   const script = globalContext.document.createElement("script");
+  // We're removing stack trace information in the page script instead
+  // eslint-disable-next-line @bitwarden/platform/no-page-script-url-leakage
+  script.src = chrome.runtime.getURL("content/fido2-page-script.js");
   script.async = false;
 
-  const pageScriptUrl = chrome.runtime.getURL("content/fido2-page-script.js");
-  // Inject the script contents directly to avoid leaking the extension URL
-  try {
-    const response = await fetch(pageScriptUrl);
-    const scriptContents = await response.text();
-    script.innerHTML = scriptContents;
-  } catch {
-    // eslint-disable-next-line no-console
-    console.error("Failed to load FIDO2 page script contents. Injection failed.");
-    return;
-  }
-
   // We are ensuring that the script injection is delayed in the event that we are loading
   // within an iframe element. This prevents an issue with web mail clients that load content
   // using ajax within iframes. In particular, Zimbra web mail client was observed to have this issue.