diff --git a/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.spec.ts b/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.spec.ts
index 231cf10b63f..174d2c7ffa8 100644
--- a/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.spec.ts
+++ b/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.spec.ts
@@ -424,6 +424,19 @@ describe("AutofillInlineMenuIframeService", () => {
           forceClose: true,
         });
       });
+
+      it("triggers a fade in of the inline menu", () => {
+        jest.useFakeTimers();
+        jest.spyOn(globalThis, "clearTimeout");
+        autofillInlineMenuIframeService["fadeInTimeout"] = setTimeout(jest.fn, 10);
+
+        sendPortMessage(portSpy, { command: "fadeInAutofillInlineMenuIframe" });
+        expect(clearTimeout).toHaveBeenCalled();
+        expect(autofillInlineMenuIframeService["iframe"].style.opacity).toBe("0");
+
+        jest.advanceTimersByTime(10);
+        expect(autofillInlineMenuIframeService["iframe"].style.opacity).toBe("1");
+      });
     });
   });
 
diff --git a/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.ts b/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.ts
index a8d4c7354de..51de9769a10 100644
--- a/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.ts
+++ b/apps/browser/src/autofill/overlay/inline-menu/iframe-content/autofill-inline-menu-iframe.service.ts
@@ -308,6 +308,9 @@ export class AutofillInlineMenuIframeService implements AutofillInlineMenuIframe
     void this.sendExtensionMessage("closeAutofillInlineMenu", { forceClose: true });
   }
 
+  /**
+   * Triggers a fade in effect for the inline menu iframe. Initialized by the background context.
+   */
   private handleFadeInInlineMenuIframe() {
     this.clearFadeInTimeout();
     this.fadeInTimeout = globalThis.setTimeout(() => {
@@ -315,6 +318,9 @@ export class AutofillInlineMenuIframeService implements AutofillInlineMenuIframe
     }, 10);
   }
 
+  /**
+   * Clears the fade in timeout for the inline menu iframe.
+   */
   private clearFadeInTimeout() {
     if (this.fadeInTimeout) {
       clearTimeout(this.fadeInTimeout);