Troubleshooting
- 3D videos do not work with certain NVIDIA drivers in Firefox 11
- 64-bit Firefox crashes with Citrix's XenApp VM
- Add and delete collections in MDN Plus
- Add-ons are disabled after updating Firefox
- Add-ons Blocklist
- Add-ons disabled or fail to install on Firefox
- Add-ons failing to install on Firefox
- Add-ons hidden after updating to Firefox 7
- Add-ons hidden after updating to Firefox 7 for Mobile
- Add-ons missing after updating to Firefox 7
- Add-ons that cause stability or security issues are put on a blocklist
- Address screen sharing issues with Firefox on macOS 15 Sequoia
- Adobe Flash plugin has crashed - Prevent it from happening again
- Adobe Flash protected mode in Firefox
- Animated Persona stops working
- Animated theme stops working
- Appcache is showing up as uncached or disabled
- A quick guide to Firefox for Windows 8 Touch
- AUS Update XML File Malformed 200
- AUS Update XML File Not Found 404
- Automatic Conversion of Google mail accounts to oAuth2.0 Authentication
- Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication
- Automatic Conversion of Google mail accounts to oAuth2.0 Authentication Redirect 1
- Avoid and report Mozilla tech support scams
- Avoid crashes - Tips and tricks
- Avoid getting locked out of your Mozilla account
- Avoiding Quota Limits on Mail Servers
- A web page isn't loading on Firefox for iOS
- Back and forward or other toolbar items are missing
- Back up your Firefox installation folder
- "Bad request" error no Firefox Private Network extension
- "Bad request" error on Firefox Private Network extension
- "Bad request" error on the Firefox Private Network extension
- Basic Troubleshooting
- Blank messages in Hotmail
- Bookmarks and toolbar buttons not working after upgrading
- Bookmarks not saved
- Build number not displayed
- Buttons stop working until you refresh
- Calendar (Lightning and Sunbird) FAQ
- Calendar updates issues with Thunderbird
- Can I create a single account for all of the students in my classroom to use?
- Can I subscribe to my list via RSS?
- Cannot clear Location bar history
- Cannot connect after upgrading Firefox
- Cannot delete messages
- Cannot log in to Firefox Home App
- Cannot log in to websites
- Cannot read text after selecting a Persona
- Cannot receive messages
- Cannot remove an add-on (extension or theme)
- Cannot scroll with mouse wheel or touchpad
- Cannot send messages
- Cannot uninstall an add-on
- Cannot uninstall an add-on Redirect 1
- Cannot view full screen Flash videos
- Can't add, change or save bookmarks - How to fix
- Can’t connect to Internet on public WiFi with Mozilla VPN
- Can't log in to Firefox Home App on iOS - What to do
- Can't log in to my online bank account on Firefox
- Can’t save to Pocket in Firefox - Asked to log in every time
- Can't update Accuweather or Wikipedia on ZTE Open
- Captive portal detection
- CCleaner is deleting Firefox extension settings in Firefox 79
- Certificate contains the same serial number as another certificate
- Certificate contains the same serial number as another certificate Redirect 1
- Changes to toolbars and window sizes are not saved
- Check for Updates is disabled
- Choose which browser opens Pocket web content on your Android
- Chrome registration failed
- Clipboard not working
- Closing the only tab closes the window
- Common questions after updating Firefox
- Common questions after updating to Firefox version 29
- Common questions after updating to the new Firefox
- Common questions after upgrading from Firefox 3.6
- Compacting folders - Potential complications
- Compatibility with Exploit protection in Windows 10
- Compatibility with Exploit protection on Windows
- Confirm following elevation request to remove orphan password bank
- Connectivity or crashing issues after Firefox 43 update
- Contact Firefox OS carrier support
- Contact support from my Mozilla VPN app
- Contributor Home Page TB
- Could not initialize the browser security component
- Crashes involving STOPzilla
- Crashes on startup after the update to Firefox 46 on OS X
- Crash on Broadwell-U with old microcode
- Crash signature - 0x0
- Crash signature - arena_run_reg_alloc
- Crash signature - _eFOGetName
- Crash signature - GraphWalker::DoWalk
- Crash signature - js_FinishSharingTitle
- Crash signature - js_Interpret
- Crash signature - js_LockGCThingRT
- Crash signature - js_TraceObject
- Crash signature - KiFastSystemCallRet
- Crash signature - memcpy fillInCell
- Crash signature - memmove
- Crash signature - nsCycleCollectingAutoRefCnt decr nsISupports