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Firefox Reader View for clutter-free web pages
Firefox Reader View removes web page clutter to improve readability. Recent Firefox versions can also read pages out loud.
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.
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.
Back up and transfer your Firefox data to a new device
Learn how to transfer your browser data when switching devices using Firefox Sync. Back up your bookmarks, history, passwords, etc. with your Mozilla account.
Add-on Badges
You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.
Permission request messages for Firefox extensions
Learn about permission requests when adding extensions to Firefox. Get details on each request for a clearer understanding.
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.
Enhanced Tracking Protection in Firefox for desktop
Enhanced Tracking Protection in Firefox automatically protects your privacy while you browse.
Access Mozilla services with a Mozilla account
Mozilla account is a safe and easy way to access Mozilla services on all your devices. Learn how to create an account and access services.
Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
Understanding the risks of installing self-hosted extensions
Learn about the risks of installing extensions from third-parties and how to assess the trustworthiness of the source.
How to 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.
Firefox Page Info window
The Firefox “Page Info” window gives you details about the page you're on. You can also use it to change permissions for the website.
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.
Keyboard shortcuts - Perform common Firefox tasks quickly
This is a list of Firefox keyboard shortcuts for working with tabs, bookmarks, searching the web, playing media files and more.
Website will not allow Firefox to display the page if another site has embedded it
This page explains the error: "Website will not allow Firefox to display the page if another site has embedded it"
Thunderbird and Junk / Spam Messages
This article explains how Thunderbird's adaptive filter learns to identify junk mail ("spam").
Windows 10 warns me to use a "Microsoft-verified" app
Windows 10 may interrupt your Firefox install with a warning about "Microsoft-verified apps". Firefox is safe to install and use, so choose "install anyway".
Third-party trackers
Learn about cross-site cookies, which are used on many websites.