Also, the mouse becomes a spinning wait cursor when it's over the Firefox window. This article gives you solutions to Firefox hangs depending on when they happen. To resolve hanging problems not specifically mentioned in this article, or if the suggested solutions do not solve the problem, see Troubleshoot and diagnose Firefox problems. If Firefox seems to hang randomly and not after a specific action for example, downloading a file or quitting Firefox , try the solutions in this section. If hangs are periodic , it may be caused by a corrupted places database.
Click the menu button , click Help and select Troubleshooting Information.
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From the Help menu, choose Troubleshooting Information. The Troubleshooting Information tab will open.
Click the menu button and then click Exit Quit. Click the Firefox menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox. Click the Firefox menu , then click Quit. With some graphics card and graphics driver setups, Firefox may hang when using hardware acceleration. You can try turning off hardware acceleration to see if it fixes the problem. If the problem is no longer happening, then hardware acceleration was likely the cause.
You can try updating your graphics drivers to see if that fixes it or simply run without hardware acceleration.
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Firefox may be slow to respond or hang if multiple copies of its Session Restore file have been created:. If you're using a proxy auto-config file PAC , Firefox may hang when you attempt to load sites that don't exist or that you haven't opened recently. To determine if you use an automatic proxy configuration file:. See Playing Flash videos makes Firefox hang. The latest Firefox versions includes improvements in memory usage, especially during long sessions. Update Firefox to the latest version. If you regularly leave Firefox open so that you return to where you left off, you may want to use Firefox's Session Restore feature.
For more information, see Configuring session restore. Firefox may hang when downloading files if your download history has grown too large.
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To clear the download history:. Firefox may hang if the last download folder location e. To fix this:. See if you are now able to download files or save images. If this works, you can go back to your Firefox settings, if you wish, and select Always ask me where to save my files. Sometimes when you close Firefox, it may stop responding and remain in memory, even though no Firefox windows are open.
This can prevent Firefox from working properly the next time you open it or you may see a "Close Firefox" dialog box with an error message, Firefox is already running, but is not responding. A copy of Firefox is already open. Red Hat Customer.
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