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- Recover important data from an old profile
- Diagnose Firefox issues using Troubleshoot Mode
- Back up and restore information in Firefox profiles
- Website will not allow Firefox to display the page if another site has embedded it
- Captive portal detection
- Secure connection failed and Firefox did not connect
- Accessibility features in Firefox - Make Firefox and web content work for all users
- Accessibility not available during multi-process support
- Can I use my screen reader with the new Firefox?
- How to save a web page
- How to print web pages in Firefox
- Where to find and manage downloaded files in Firefox
- How to search IMDB, Wikipedia and more from the address bar
- Search with the Firefox address bar
- Remove websites from the address bar suggestions
- Custom installation of Firefox on Windows
- Uninstall Firefox from your computer
- Install an older version of Firefox
- Firefox options, preferences and settings
- Add-on Badges
- How to search IMDB, Wikipedia and more from the address bar
- Block and unblock websites with parental controls on Firefox
- Pop-up blocker settings, exceptions and troubleshooting
- Use a Primary Password to protect stored logins and passwords
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Secure connection failed and Firefox did not connect
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.
Add-on signing in Firefox
Learn about add-on signing and what to do if an extension you want to use could not be verified for use in Firefox.
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
Description of how Firefox detects captive portal networks.
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