Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Firefox Support

Popular Searches: Update Firefox Profiles Firefox Sync

Frequent Topics

Explore the knowledge base.

Troubleshooting icon

Troubleshooting

Basic browsing icon

Basic browsing

Install and update icon

Install and update

Sync and save icon

Sync and save

Customize settings and preferences icon

Customize settings and preferences

Protect your privacy icon

Protect your privacy

Firefox for families icon

Firefox for families

Install and manage add-ons icon

Install and manage add-ons

Back up your data icon

Back up your data

Still need help?

We’re here for you. Post a question to our support forums and get answers from our community of experts.

Ask the Community

Featured Articles

Secure connection failed and Firefox did not connect

Secure connection failed and Firefox did not connect

If a website requires a secure connection that cannot be established, Firefox will not connect to protect you and will show you an error page. Learn more.

Make Firefox your default browser on Windows

Make Firefox your default browser on Windows

Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.

Update Firefox to the latest release

Update Firefox to the latest release

Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux.

Captive portal detection

Captive portal detection

Description of how Firefox detects captive portal networks.

Illustration of community

Join Our Community

Grow and share your expertise with others. Answer questions and improve our knowledge base.

Learn More