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Common Myths about Private Browsing
Learn more about common misconceptions about Private Browsing in Firefox.
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
Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux.
Secure connection and security warning error pages in Firefox
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.
Where to find and manage downloaded files in Firefox
The Downloads panel and Library keep track of files you download. We'll show you how to access, manage, change settings and find your files.
About Add-on Badges
You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.
What Windows 10 end of support means for Firefox users
Learn how Firefox will continue supporting Windows 10 after Microsoft ends its updates, and discover the steps Mozilla recommends to keep your browsing experience secure.
About permission request messages for Firefox extensions
Learn about permission requests when adding extensions to Firefox. Get details on each request for a clearer understanding.
Troubleshoot time-related errors on secure websites
Learn why you might see time-related errors on HTTPS websites and how you can troubleshoot these errors by correcting your system clock.
Windows 10 warns me to use a "Microsoft-verified" app
Windows 10 may interrupt your Firefox install with a “Microsoft-verified apps” warning. Firefox is safe to install, so choose “install anyway”.
View site information with Page Info
Learn what the Firefox Page Info window shows about a site and what settings you can change directly.
Avoid and report Mozilla tech support scams
Mozilla does not provide telephone support and does not charge for software downloads, upgrades or technical help. Learn more.
View and edit PDF files using Firefox’s built-in viewer
You can view PDF files directly in Firefox with the built-in viewer. Learn how to use the PDF viewer and how to resolve common problems.
Access AI chatbots in Firefox
Using AI chatbots is optional. Learn more about the providers you can choose, how to remove the shortcut and what to keep in mind when using AI chatbots.
Enhanced Tracking Protection in Firefox for desktop
Enhanced Tracking Protection in Firefox automatically protects your privacy as you browse.
Fix "The bookmarks and history system will not be functional" error message
This article explains what to do if you see the error message “The bookmarks and history system will not be functional” when you start Firefox.
Fix error “Website will not allow Firefox to display the page.”
Learn why Firefox may block a page embedded by another site, and what you can do to open it.
Password Manager - Remember, delete and edit logins and passwords in Firefox
Firefox's password management feature securely stores your usernames and passwords. Learn how to save, view, manage and protect your logins.
How to install Firefox on Windows
This article describes how to download and install Firefox on Windows.
Insecure connection password warning in Firefox
Firefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.