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Common Myths about Private Browsing
Learn more about common misconceptions about Private Browsing in Firefox.
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.
Enhanced Tracking Protection in Firefox for desktop
Enhanced Tracking Protection in Firefox automatically protects your privacy while you browse.
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.
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.
Firefox options, preferences and settings
Settings panels give you access to Firefox settings. This article describes what types of settings are available in each panel.
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".
Captive portal detection
Description of how Firefox detects captive portal networks.
Install Firefox on Linux
This article describes how to download and install Firefox on Linux.
Private Browsing on Firefox for Android
Private Browsing on your mobile device is great for viewing websites incognito - without saving information about the sites you visit.
Insecure connection password warning in Firefox
Firefox issues an insecure password warning when a web page's login form is not secure and your information could be stolen.
Enhanced Tracking Protection in Firefox for Android
Control who's watching you on the Internet. This article explains how to turn on Tracking Protection in Firefox for Android.
Make Firefox your default browser on Windows
Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.
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.
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.