Restart your computer
Sometimes problems can be fixed by simply restarting your computer and then starting Firefox again.
Clear your cookies and cache
Many problems with loading web pages can be resolved by clearing Firefox’s cookies and cache:
- Click the Library button, click History and select Clear Recent History….
- In the Time Range to clear: drop-down, select Everything.
- Click the arrow next to Details to display the list of items that can be cleared.
- Select both Cookies and Cache.
- Click Clear Now.
Restart Firefox in Safe Mode
Firefox Safe Mode is a troubleshooting mode that disables all extensions, uses the default theme, turns off hardware acceleration, and uses default toolbar settings and controls, among other things. To start Firefox in Safe Mode:
- Click the menu button, click Help and select Restart with Add-ons Disabled…. Firefox will start up with the Firefox Safe Mode dialogue.
- In the Firefox Safe Mode dialogue, click Start in Safe Mode.
- Check whether your problem is still happening while in Safe Mode.
- If the problem still happens in Safe Mode, go on to step 4.
- If the problem does not happen in Safe Mode, see the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article and follow the instructions under The problem does not occur in Safe Mode to narrow down the cause.
Some Firefox issues can be caused by a problem with one of the Firefox program files. Follow these steps to completely remove and reinstall Firefox. This process will not remove your Firefox profile data (such as bookmarks and passwords), since that information is stored in a different location.
Note: You might want to print these steps or view them in another browser.
- Download the latest official version of Firefox from org.
- Exit Firefox:
Click the Firefox menu, then click Exit.
- Uninstall Firefox from your computer.
- Delete the Firefox program folder, which is located in one of these locations by default:
- C:\Program Files\Mozilla Firefox
- C:\Program Files (x86)\Mozilla Firefox
- Reinstall Firefox – see How to download and install Firefox on Windows for instructions.
Now start Firefox and check to see if your problem has been fixed. If it hasn’t, continue with the next troubleshooting method.
The Refresh Firefox feature can fix many issues by restoring your Firefox profile to its default state while saving your essential information.
- Click this Refresh Firefox button directly, if you are viewing this page in Firefox.
This won’t work if you are using a different browser or on a mobile device.
- You can also find a Refresh Firefox button at the top of the Firefox about: support Troubleshooting Information
- To continue, click Refresh Firefox in the confirmation window that opens.
- Firefox will close to refresh itself. When finished, a window will list your imported information. Click Finish and Firefox will open.