How to
- Update to a new Firefox OS version
- Update to a new version
- Update to the latest version of Firefox for Android
- Update to the latest version of Firefox for Android Beta
- Update to the latest version of Firefox on Android
- Updating Firefox
- Updating Thunderbird
- Upgrade Firefox for Mobile Beta
- Upgrade your graphics drivers to use hardware acceleration and WebGL
- Upgrading from an older version of Thunderbird
- Upgrading from Firefox 1
- Upgrading from Thunderbird 2 to 3
- Upgrading from Thunderbird 3.1
- Upgrading to Firefox 3.6
- Upgrading to the new version of Firefox (84+) on Apple Silicon
- Usage Data Changes for Firefox for iOS and Android
- Use Adaptive Search to discover personalized apps
- Use Adobe Reader to view PDF files in Firefox
- Use a Master Password to protect stored logins and passwords
- Use a Master Password to protect stored logins and passwords Redirect 1
- Use a Primary Password to protect stored logins and passwords
- Use a Primary Password to protect stored logins and passwords Redirect 1
- Use bookmark folders to organize your bookmarks
- Use bookmarklets to quickly perform common web page tasks
- Use bookmarks on Firefox for Android to keep track of your favorite websites
- Use extensions to add features to Firefox
- Use Face ID on Firefox Focus for iOS
- Use Face ID or Touch ID on Firefox Klar
- Use Firefox Accounts to manage your Marketplace apps
- Use Firefox for Android to send videos to Chromecast
- Use Firefox for Android to send videos to your Roku
- Use Firefox for Android to view saved PDF files
- Use Firefox in another language
- Use Firefox in Full Screen mode
- Use Firefox Services to add social features to your browser
- Use gestures in Firefox for Android
- Use Google Trending Search in the Firefox address bar
- Use labels to keep your aliases organized in Firefox Relay
- Use labels to keep your masks organized in Firefox Relay
- Use Master Password on Firefox for Android
- Use Master Password to protecting passwords in Firefox for Android
- Use Master Password to protect passwords in Firefox for Android
- Use mouse shortcuts to perform common tasks in Firefox
- Use Multi-Account Containers with Mozilla VPN
- Use multiple profiles in Thunderbird
- Use plugins to play audio, video, games and more
- Use popular search suggestions in the Firefox Search bar
- Use QR Code Reader in Firefox for Android
- Use Scrollable Tabs for panels navigation
- Use Sync to share your Firefox bookmarks, passwords and more with Firefox for mobile
- Use Tab Groups to organize a lot of tabs
- Use tabs in Firefox for iOS
- Use tabs to organize lots of websites in a single window
- Use tabs to quickly switch websites on Firefox for mobile
- Use the Adobe Reader plugin to view or download PDF files
- Use the Awesome screen to search in Firefox for Android
- Use the Awesome Screen to search the web, bookmarks and more
- Use the Downloads window to manage downloaded files
- Use the Eyedropper tool in Firefox to sample colors
- Use the Firefox interface in other languages with language packs
- Use the Firefox sidebar to access bookmarks, history and social features
- Use the Firefox sidebar to access bookmarks, history and social features Redirect 1
- Use the Firefox Sidebar to access bookmarks, history and synced tabs
- Use the in-browser print function on Firefox for Android
- Use the Java plugin to view interactive content on websites
- Use themes to change the look of Firefox
- Use the Profile Manager to create and remove Firefox profiles
- Use the QuickTime plugin to play audio and video
- Use the Search bar in Firefox
- Use the Search bar in Firefox and manage search engines
- Use the Silverlight plugin to play audio and video
- Use voice commands with Firefox for Echo Show
- Use Voice Input in Firefox for Android
- Use Web Apps with Firefox for Android
- Using a dedicated profile for Firefox Beta
- Using a Hotmail/Live Alias with Thunderbird.
- Using a master password with Sync
- Using a Primary Password with Sync
- Using Dark Theme in Firefox for Android
- Using Dark Theme in Firefox for iOS
- Using extensions with Firefox
- Using Firefox for Android to view saved PDF files
- Using Firefox for Windows Update
- Using Firefox with a 64-bit Operating System
- Using Identities
- Using Lightning with Google Calendar
- Using Master Password on Firefox for Android
- Using Multiple Profiles
- Using Outlook Web Access in Firefox
- Using plugins with Firefox
- Using Pocket offline
- Using Pocket on Kindle devices
- Using Reading Time Estimates and Viewed Item Status in Pocket for Android
- Using Saved Searches
- Using SMS app Firefox OS
- Using Tabs on Firefox for Android
- Using the Adobe Reader plugin with Firefox
- Using the Call Log
- Using the camera
- Using the Firefox OS browser