The behavior might lead to Firefox crashing on your device. Check Internet ConnectionĪ bad internet connection messes up the browsing experience as the tab keeps trying to connect to the web address and keeps throwing errors in the end. Firefox may have shut down abnormally, leaving the lock file in place. If Firefox did not shut down normally when you last used it, Firefox might still be running in. I will mention the platform wherever required. 'Firefox is already running but is not responding' error - How to fix End Firefox processes. Most troubleshooting tricks are applicable for both Windows and Mac. Some of the possible reasons include outdated extensions, Firefox already running in the background, sketchy internet connection, and more. To solve this problem, one of three approaches can be taken: first, close the browser on the other machine second, create a new profile or third, clear out. There are many factors behind this strange behavior on Firefox. Fix Firefox Not Responding on Windows and Mac Sometimes, you might face Firefox not responding or crashing on Windows or Mac. Restarting and resetting your browser with our methods will help you get rid of the error message. This issue can also be caused by a lack of memory due to many opened tabs. However, it’s not devoid of issues either. If Firefox is not responding, this might happen due to errors with the browser files. The software is available cross-platform, has a rich extension and theme support, and add-ons like Firefox Monitor and Firefox Lockwise separates the product from the rivals. Firefox is my go-to recommendation for anyone looking for a solid browsing experience across all devices.

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