Troubleshooting
- Fix printing problems in Firefox
- Fix problems connecting to websites after updating Firefox
- Fix problems that cause images to not show
- Fix problems with Facebook games, chat and more
- Fix problems with RealPlayer add-ons
- Fix "The bookmarks and history system will not be functional" error message
- Fix "The bookmarks and history system will not be functional" error message
- Fix the "Could not initialize the application's security component" error message
- Fix video and audio playback problems on Firefox for Windows
- Fix video and audio problems on Firefox for Windows N editions
- Flash 11.3 crashes
- Flash 11.3 crashes or does not load in Firefox 13
- Flash 11.3 crashes or doesn't load in Firefox
- Flash 11.3 doesn't load video in Firefox
- Flash-based videos and sound do not play correctly
- Flash content shows as question mark
- Flash does not work properly or will not update
- Flash videos won't play full screen
- Flash video won't play full screen on YouTube, Facebook and other websites
- Fonts look blurry
- Forgot my master password
- Form autocomplete entries are not saved
- Forum Response - How to clear the Firefox iOS Cache
- Forum Response - Marketplace for Firefox OS 1.1
- Fritz!box isn't working when Mozilla VPN is on
- Get help with an app you purchased in the Marketplace
- Getting help with your Firefox OS-based Panasonic TV
- Gmail and Thunderbird for Android
- Google Hangouts temporarily won't work on Firefox
- Google Sign-On FAQ
- Google Toolbar is no longer compatible with Firefox - Here are some alternatives
- Google Toolbar is not compatible with Firefox
- Hardware acceleration and WindowBlinds causes Firefox to crash
- Help, I still have questions
- Help, I still have questions about Firefox Private Network
- Help, I still have questions Redirect 1
- Help, I still have questions Redirect 2
- Help with Marketplace purchases
- High memory usage
- Home page with pipe character opens extra tabs when Firefox starts
- Home page with pipe symbol opens extra tabs when Firefox starts
- How can I avoid to reach the "over quota" limits of my mail server?
- How Can I Contact Support From My Mozilla VPN App?
- How can I view the background image clearly?
- How can I view the background image in the Adapative Search screen clearly?
- How can I view the background image in the Adaptive Search screen clearly?
- How do I add a web app from search results to my home screen?
- How do I add a web app from the Adaptive App Search to my home screen?
- How do I add Smart Folders to the Adaptive Search screen?
- How do I add Smart Folders to the Dynamic home screen?
- How do I avoid crashes?
- How do I cancel my subscription to Firefox Relay?
- How do I clear search history?
- How do I clear the search history on the Adaptive App Searcher?
- How do I edit options to add Adobe to the list of allowed sites
- How do I get back to the Adaptive Search Screen after I browsed a folder?
- How do I get back to the Dynamic bar screen after I browsed a folder?
- How do I get back to the Dynamic Search Screen after I browsed a folder?
- How do I get help with the Monitor Data Removal Pilot?
- How do I get more results?
- How do I get more results in the Adaptive Search Screen?
- How do I go back to the results screen when I’m using a web app inside the Adaptive Searcher?
- How do I go back to the results when I’m inside a web app?
- How do I install the Firefox Relay Extension?
- How do I install the Relay Extension?
- How do I quickly search inside my Firefox OS phone?
- How do I remove apps from my home screen?
- How do I report a Thimble bug?
- How do I restore my tabs from last time?
- How do I submit a bug for Firefox Sync?
- How do I watch Flash videos with Firefox for Android?
- How to allow Java on trusted sites
- How to avoid crashes
- How to change or reset your Mozilla account password
- How to enable Java if it's been blocked
- How to enable Reader Mode in Firefox for Android?
- How to enable Reader Mode in Firefox for Android? Redirect 1
- How to enable Reader Mode in Firefox for Android? Redirect 2
- How to fix an error when trying to open Telegram or Slack on Firefox
- How to fix Pocket login issues
- How to fix preferences that won't save
- How to fix the Update Failed error message when updating Firefox
- How to hide the tab strip when you only have one tab
- How to Install and Use another Language in the Dictionary
- How to Install and Use another Language in the Dictionary on Thunderbird
- How to join the Data Removal Pilot
- How to Localize the Knowledge Popup Tutorial
- How to pin and unpin Firefox from the taskbar in Windows 10
- How to pin and unpin Firefox from the taskbar in Windows 10 and Windows 11
- How to pin and unpin Firefox from the taskbar on Windows 10 and Windows 11 Redirect 1
- How to provide detailed information for fixing Firefox issues
- How to remove the Babylon toolbar, home page and search engine
- How to report about a faulty app in the Firefox Marketplace
- How to resolve weak crypto error messages on Firefox
- How to restore a browsing session from backup
- How to run Firefox when your profile is missing or inaccessible
- How to run Firefox when your profile is missing or inaccessible Redirect 1
- How to send a crash report on Firefox for Android
- How to set Screen Brightness Timeout on Firefox OS
- How to set Screen timeout on Firefox OS