Refresh Firfox will restore the browser to default state by creating a new profile folder for your settings and personal information. Solution 2. By using Firefox in Safe Mode, all extensions, themes, hardware acceleration will be disabled and some settings will be reset. If Firefox can restart normally in Safe Mode, the crashing problem is likely because of an extension, theme or hardware acceleration. Open menu. Click on "Help". Choose "Restart with Add-ons Disabled Select "Start in Safe Mode" in a pop-up window after restarting Firefox.
Solution 3. Remove Incompatible Add-ons Sometimes incompatible add-ons are the reasons why Firefox will not open. When you find that Firefox won't start after you installed an extension, theme, or plugin, you'd better remove it. Or it will lead to Firefox not opening problem.
What's more, if Firefox is running properly in Safe Mode, a faulted extension, theme, or plugin is possibly the cause. Click on Menu button. Activate "Add-ons Manager" tab by clicking on "Add-ons". Choose the add-on you want to remove in "Extensions or Themes" panel.
[Resolved] Why is Mozilla Firefox Not Loading Pages?
People Also Read: Mozilla Crash Reporter - Error message will show when Firefox is shuts down unexpectedly. No profile can be loaded with a message, saying "Your Firefox profile cannot be loaded. It may be missing or inaccessible". Failed to read the configuration file.
This error often comes up after a software update. Other errors which are caused by extensions, themes or hardware acceleration, such as "XML Parsing Error: No error message is shown, but Firefox will not open. Solution 4. Uninstall your Mozilla Firefox. Install a proper version of Mozilla Firefox from Firefox website. Share Your Masterpiece on FonePaw. Featured Stories. Jan 31 , Hidata: Better Support for iOS Dec 24 , Tips: How to Enable Dark mode on Android Nov 23 , XS Max vs. XR vs. Sep 27 , iPhone XR vs.
May Messages in iCloud: Files Recovery for PC Apr 18 , Mar 21 , Feb 23 , Whether Firefox shows you an error message every time you try to launch the app or right when you're in the middle of a working session, there is only one way to fix that — reinstall the application. The easiest way to reinstall Firefox is to quit it, delete the Firefox file from your Applications folder, and download the new version from the official Mozilla website. That will uninstall the application but keep all your user data intact, and when you reinstall a new copy, you bookmarks and passwords will still be there.
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But that's not the best way to do it, since Firefox leaves all kinds of data on your hard drive besides the main application file. There are rare cases when the "Firefox quit unexpectedly" message could be caused by the Mac security update. This happens when your Mac's firewall used to recognize previous versions of Firefox but no longer trusts the new one. Follow official Mozilla documentation to fix this issue.
So your Firefox is fast and doesn't randomly quit, but still doesn't seem to load websites. There are a few things that might cause this, so let's zero in on the problem by gradually excluding various perpetrators. Turn your modem off and on helps in nearly all cases. As soon as you launch NetSpot , make sure it's set to Discover mode, and it will scan all nearby WiFi networks automatically.
WiFi Explorer is just as easy — launch the app and click the play button to analyze the network quality around you. If your WiFi network seems to be fine, it's good to check whether the connection works in other browsers, like Safari or Chrome, just to make sure that the problem in fact is with Firefox specifically. Then, check the settings in your firewall by following the steps outlined by Mozilla.
If upon loading the website you get the "Proxy server is refusing connections" message, there is an easy fix for that. In case Firefox shows you that it has troubles validating some website's security certificate, it might be related to improperly set date and time on your system. Another option you can try is flushing the DNS cache, which acts as a temporary database, storing all sorts of connectivity logs and website access attempts. Combine flushing the DNS cache with clearing out cache and cookies from Firefox, and restarting your Mac to get the best result.
If you are still experiencing troubles loading websites, it could be that DNS prefetching is at play. Usually Firefox tries to speed up loading new websites by using DNS prefetching, but it can also cause loading errors with some system configurations. To disable DNS prefetching:. The last step to try to fix the website loading issue is to check your system for malware. If you remember Firefox being haunted by ad pop-ups, toolbars you didn't install yourself, or a new default home page, you might have picked up some malware that's hijacking your browser sessions.
It's a free download, with a pro license for more active, real-time protection. The free product will however scan your Mac and safely remove any malware at no cost to you. When your Firefox is just generally behaving incorrectly, a few more tips might come in handy. Start with restarting your Mac, and then clear the cache and troubleshoot your plugins as described above.
When clearing the cached data doesn't help, try restarting the browser in Safe Mode. This will temporarily turn off your extensions, as well as any extra themes and toolbars, and hardware acceleration. The easiest way to do this is to quit Firefox and restart it holding down your Mac's Option key. If the problem you were having magically goes away in Safe Mode, then you can proceed to check your extensions, themes, and anything else you've added to Firefox.
If you're still having the problem in Safe Mode, that's a sign you might need to just trash your copy of Firefox and start over with a fresh install. There is another clever feature inside Firefox that clears out your extensions and themes, plus resets all the preferences to default, but keeps your personal information intact, including bookmarks, history, open tabs and windows, saved passwords, autofill info, and even cookies. For times, when neither options fixed the problem, try creating a fresh Firefox profile, which won't have any of your bookmarks, passwords, and user preferences, but might get rid of the problem.
In cases when Safe Mode seemed to fix the problem but checking plugins didn't bring any result, the problem may hide in hardware acceleration, which is off by default in Safe Mode. Here's how to turn it off in the regular mode too:. There you go. About a dozens of apparent and not-so-apparent tips should bring your Firefox to the best shape possible.
Common issues with Firefox on Mac and how to fix them
And even if you don't experience many troubles with Firefox, following some tips above would help you optimize its speed and responsiveness. Best of all, you don't need a lot of third-party tool to perform a thorough checkup, and all the tools you need are easily available on Setapp. Common issues with Firefox on Mac and how to fix them What are the most frequent problems with Firefox? Firefox is slow or freezes completely Slow browsing experience is truthfully beyond annoying. Close inactive tabs See how many tabs you have opened.
[Resolved] Why is Mozilla Firefox Not Loading Pages?
Clear Firefox cookies and cache All the websites you visit leave behind cached image files, which are supposed to speed up load times, and cookies, which can save you from having to log in over and over. If Firefox is acting up, you can clear cookies and cache by doing the following: Update Firefox and macOS If closing tabs and clearing the cache didn't work, it's a good idea to update Firefox and macOS to its latest versions.
See what consumes hardware resources If the problem persists, check for high hardware resource usage. Troubleshoot plugins and extensions It's very likely that one of your installed plugins is the culprit.
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Stop loading Flash content Preventing Flash content from loading automatically deserves a separate explanation. Firefox crashes unexpectedly Whether Firefox shows you an error message every time you try to launch the app or right when you're in the middle of a working session, there is only one way to fix that — reinstall the application. To reset the Firefox browser app on mac: Launch CleanMyMac Go to the Uninstaller tab Choose Firefox from the list Choose Application reset and click Uninstall round button There are rare cases when the "Firefox quit unexpectedly" message could be caused by the Mac security update.
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Firefox shows errors loading websites So your Firefox is fast and doesn't randomly quit, but still doesn't seem to load websites. Check your network connection Turn your modem off and on helps in nearly all cases. Launch websites in other browsers If your WiFi network seems to be fine, it's good to check whether the connection works in other browsers, like Safari or Chrome, just to make sure that the problem in fact is with Firefox specifically.
Fix the proxy server issue If upon loading the website you get the "Proxy server is refusing connections" message, there is an easy fix for that. Validate the security certificate In case Firefox shows you that it has troubles validating some website's security certificate, it might be related to improperly set date and time on your system.
Firefox won't open on Mac despite trying everything I've read
Flush DNS cache Another option you can try is flushing the DNS cache, which acts as a temporary database, storing all sorts of connectivity logs and website access attempts. To disable DNS prefetching: In the address bar, type about: The about: Click "I accept the risk! Hold down the Ctrl key while you click on the list of preferences. Select New and then select Boolean. In the "Enter the preference name" field, enter network.
Select True when prompted to set the value and click OK. Scan your Mac for malware The last step to try to fix the website loading issue is to check your system for malware.