Fix alias suggestions on titled registration forms

apps/extension/src/autofill.test.ts

@@ -880,6 +880,33 @@ describe("extension automatic autofill", () => {
     expect(isProfileOrRegistrationEmailField(email)).toBe(true);
   });
 
+  it("uses a registration page title for generic legacy forms without overriding exclusions", () => {
+    const previousTitle = document.title;
+    document.title = "Demo Site – Registration Form – Vinoth Tech Solutions";
+    document.body.innerHTML = `
+      <form class="visual-form-builder" action="/demo-site/">
+        <fieldset><legend>Registration Form</legend></fieldset>
+        <label for="vfb-14">Email *</label>
+        <input type="email" name="vfb-14" id="vfb-14" class="vfb-text required email">
+        <input type="submit" name="vfb-submit" value="Submit">
+      </form>
+      <form id="newsletter">
+        <input id="newsletter-email" type="email">
+        <button type="submit">Subscribe</button>
+      </form>
+      <form id="contact-form">
+        <input id="contact-email" type="email">
+        <button type="submit">Submit</button>
+      </form>
+    `;
+
+    expect(isRegistrationEmailField(document.querySelector("#vfb-14"))).toBe(true);
+    expect(isProfileOrRegistrationEmailField(document.querySelector("#vfb-14"))).toBe(true);
+    expect(isRegistrationEmailField(document.querySelector("#newsletter-email"))).toBe(false);
+    expect(isRegistrationEmailField(document.querySelector("#contact-email"))).toBe(false);
+    document.title = previousTitle;
+  });
+
   it("supports passwordless multi-step signup but rejects ambiguous standalone email fields", () => {
     document.body.innerHTML = `
       <form id="registration-step-one" action="/accounts/register">

apps/extension/src/autofill.ts

@@ -752,6 +752,15 @@ function registrationFormEvidence(input: HTMLInputElement): {
     .join(" ");
   const structural = `${form.id} ${form.className} ${form.getAttribute("name") ?? ""} ${form.getAttribute("aria-label") ?? ""} ${form.getAttribute("action") ?? ""}`;
   const hint = `${structural} ${controls}`.toLocaleLowerCase();
+  // Some older form builders expose a completely generic <form> and "Submit" button while
+  // putting the only registration signal in the document title. Keep this signal deliberately
+  // narrow and subordinate to form-specific negative evidence so a newsletter or contact form
+  // embedded on a registration-themed page never receives an alias suggestion.
+  const pageTitle = input.ownerDocument.title.toLocaleLowerCase();
+  const pageTitleHasRegistrationIntent =
+    /(?:^|[^a-z])(?:create[-_\s]*(?:an?[-_\s]*)?account|register|registration|sign[-_\s]*up|signup)(?:[^a-z]|$)/u.test(
+      pageTitle,
+    );
   return {
     negative:
       /(?:^|[^a-z])(?:contact|forgot|log[-_\s]*in|newsletter|recover(?:y)?|reset[-_\s]*password|search|sign[-_\s]*in|subscribe)(?:[^a-z]|$)/u.test(
@@ -760,7 +769,7 @@ function registrationFormEvidence(input: HTMLInputElement): {
     positive:
       /(?:^|[^a-z])(?:create[-_\s]*(?:an?[-_\s]*)?account|get[-_\s]*started|join|register|registration|sign[-_\s]*up|signup)(?:[^a-z]|$)/u.test(
         hint,
-      ),
+      ) || pageTitleHasRegistrationIntent,
   };
 }