diff --git a/apps/browser-extension/src/utils/formDetector/FormDetector.ts b/apps/browser-extension/src/utils/formDetector/FormDetector.ts
index 8666d6d73..e65f7f45d 100644
--- a/apps/browser-extension/src/utils/formDetector/FormDetector.ts
+++ b/apps/browser-extension/src/utils/formDetector/FormDetector.ts
@@ -246,12 +246,17 @@ export class FormDetector {
    * @returns True if the field matches exclusion patterns and should be excluded from autofill.
    */
   private matchesExclusionPatterns(input: HTMLInputElement): boolean {
-    // Collect all text attributes to check
+    /*
+     * Collect text attributes to check. The `class` attribute is intentionally
+     * excluded: utility-CSS frameworks (Tailwind, DaisyUI, etc.) routinely emit
+     * tokens like `duration-100`, `outline-none`, `bg-base-100` whose
+     * word-boundary parts collide with generic exclusion words ("duration",
+     * "access", "settings", ...).
+     */
     const attributesToCheck = [
       input.id,
       input.getAttribute('name'),
       input.getAttribute('placeholder'),
-      input.getAttribute('class'),
       input.getAttribute('aria-label')
     ]
       .map(a => a?.toLowerCase() ?? '')
diff --git a/apps/browser-extension/src/utils/formDetector/__tests__/FormDetector.en.test.ts b/apps/browser-extension/src/utils/formDetector/__tests__/FormDetector.en.test.ts
index 62d835152..3ed6c331a 100644
--- a/apps/browser-extension/src/utils/formDetector/__tests__/FormDetector.en.test.ts
+++ b/apps/browser-extension/src/utils/formDetector/__tests__/FormDetector.en.test.ts
@@ -86,6 +86,13 @@ describe('FormDetector English tests', () => {
     testField(FormField.Email, 'account_name_text_field', htmlFile);
   });
 
+  describe('English login form 5 detection (Tailwind, no form wrapper, placeholder-only labels)', () => {
+    const htmlFile = 'en-login-form5.html';
+
+    testField(FormField.Username, 'username-input', htmlFile);
+    testField(FormField.Password, 'password-input', htmlFile);
+  });
+
   describe('English registration form 8 detection (Roblox-style birthdate)', () => {
     const htmlFile = 'en-registration-form8.html';
 
diff --git a/apps/browser-extension/src/utils/formDetector/__tests__/test-forms/en-login-form5.html b/apps/browser-extension/src/utils/formDetector/__tests__/test-forms/en-login-form5.html
new file mode 100644
index 000000000..3ca3ba147
--- /dev/null
+++ b/apps/browser-extension/src/utils/formDetector/__tests__/test-forms/en-login-form5.html
@@ -0,0 +1,19 @@
+<!--
+Login form using Tailwind/utility classes with no <form> wrapper, no <label>s,
+and inputs identified primarily by placeholder, name and data-testid.
+The username input only has `placeholder="johnny"` and `name="username"` for
+hints, and the password input is `type="password"` with no name or id.
+-->
+<div class="p-4 mx-auto flex flex-col gap-3 justify-between max-w-[30rem] min-w-80 w-full bg-slate-50 dark:bg-neutral-800 rounded-xl shadow-md border border-sky-100 dark:border-neutral-700" data-testid="login-form">
+    <p class="text-3xl text-black dark:text-white text-center font-extralight">Enter your credentials</p>
+    <div data-orientation="horizontal" role="none" class="shrink-0 bg-border h-[1px] w-full"></div>
+    <div>
+        <p class="text-sm text-black dark:text-white w-fit font-semibold mb-1">Username</p>
+        <input id="username-input" class="w-full rounded-md p-2 border-neutral-content border-solid border outline-none focus:border-primary duration-100 bg-base-100" placeholder="johnny" data-testid="username-input" type="text" value="" name="username" autocomplete="off">
+    </div>
+    <div class="w-full">
+        <p class="text-sm text-black dark:text-white w-fit font-semibold mb-1">Password</p>
+        <input id="password-input" class="w-full rounded-md p-2 border-neutral-content border-solid border outline-none focus:border-primary duration-100 bg-base-100" placeholder="••••••••••••••" data-testid="password-input" type="password" value="" autocomplete="off">
+    </div>
+    <button class="inline-flex items-center focus:outline-none outline-none justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium ring-offset-background duration-150 focus-visible:outline-none disabled:pointer-events-none disabled:opacity-50 select-none bg-accent text-white hover:bg-accent/90 border border-violet-400 px-4 py-2 w-full" type="submit" data-testid="submit-login-button">Login</button>
+</div>