6 Easy Tips to Fix Bitwarden Autofill not Working in Firefox

Note that corrupt cache files are often triggering this problem

by Sagar Naresh
Sagar Naresh
Sagar Naresh
Sagar is a web developer and technology journalist. Currently associated with WindowsReport and SamMobile. When not writing, he is either at the gym sweating it out or playing... read more
Fact checked by Alex Serban
Alex Serban
Alex Serban
Browser & Networking Expert
After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server... read more
Affiliate Disclosure
  • Bitwarden is a popular password manager that helps you keep your password safe and secure and works with all popular browsers.
  • However, Firefox users have been complaining for a while regarding the Bitwarden autofill feature not working on the browser.
  • This guide lists down some of the effective tips that will help you resolve the problem. For example, you should uninstall other password managers.
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We use password managers to not only save our passwords securely but to use other features provided by it such as autofill, etc.

When certain features do not work, then the software itself becomes half-useful. Something similar is being faced by Bitwarden users.

You will find several users reports on official forums and on Reddit regarding Bitwarden autofill not working in the Firefox browser. In simple words, Bitwarden fails to autofill username and password on websites.

This could be quite frustrating as you might be using a password manager for this specific feature. Luckily, we have a few tips that will help you resolve the Bitwarden autofill not working in the Firefox issue. Let us check it out.

Why is Bitwarden autofill not working in Mozilla Firefox?

There aren’t any specific reasons why Bitwarden might completely fail to fill in your username and password in the Mozilla Firefox browser.

However, after our research, we found out that there are a few simple things that users have been overlooking that could be the potential cause for this issue, which we have mentioned below.

  • Your browser isn’t up to date
  • Corrupt cache files are triggering the problem
  • The extension shortcut is missing
  • You are using multiple password managers
  • Bitwarden extension isn’t enabled

Now that you are aware of the common causes that could lead to Bitwarden autofill not working in the Firefox issue, let us turn our attention towards how to resolve it.

Quick Tip:

A quick and low-effort way to get rid of this issue is to use a different browser. If you want a smooth transition with straightforward support to transfer all your bookmarks and preferences, use Opera.

Opera is a very responsive browser with a low error rate. You can install the Bitwarden Opera extension directly from the official Opera add-on store.


Use Bitwarden error-free with a responsive, secure, and easy-to-use browser!

How can I fix Bitwarden autofill not working in Firefox issue?

1. Uninstall other password managers

It is very important to ensure that you are not using multiple password managers in the Firefox browser.

If you are using multiple password managers, then this could conflict with the performance of each other. Many important functions, such as autofill, won’t work, as the browser may get confused about which password manager to use for the specific task.

So, if you are using multiple password managers, then uninstall all of them except Bitwarden, and make sure Bitwarden is the only password manager installed.

2. Update Firefox

  1. Open Firefox.
  2. Click on the 3-line menu icon on the top toolbar.
  3. Head to Help, then to About Firefox.
  4. Firefox will automatically check for new updates and if it detects one, will install it.
  5. After the download is complete, simply click on the Restart to update Firefox button.

3. Clear cookies and cache

  1. Launch Firefox.
  2. Click on the 3-line menu icon.
  3. Click on Settings.
  4. From the left pane, select Privacy & Security.
  5. Under the Cookies and Site Data section hit the Clear Data button.
  6. Make sure to check the boxes next to Cookies and Site Data and Cache Web Content.
  7. Hit the Clear button.

4. Check if the extension shortcut is missing

  1. Open Firefox.
  2. In the address bar, enter the below address and press Enter: about:addons
  3. From the left pane, select Extension.
  4. Hit the cog wheel Settings icon next to the Manage Your Extensions heading.
  5. Select the Manage Extension Shortcuts option.
  6. Check if the Auto-fill the last used login for the current website is set or not.

5. Check if the extension is enabled or not

  1. Open Firefox.
  2. Click on the 3-line menu icon.
  3. Select Add-ons and themes.
  4. Check if Bitwarden is enabled or not. If not, then enable it.

6. Manually trigger autofill function

  1. Head to the website where you want to use the Bitwarden autofill function.
  2. Right-click on the username and password field.
  3. Select Bitwarden, then Autofill.
  4. Hit the Login button and check if this fixes the issue.

This isn’t a permanent solution but can work wonders in case the autofill feature isn’t working automatically.

If nothing works, then you can simply check out other password managers that have the same autofill feature and get rid of the issue.

Let us know in the comments below which one of the above solutions helped you resolve the Bitwarden autofill not working in the Firefox problem.

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