Problem With Firefox Crashing On Startup and How To Remove Firefox (Solved)

Problem With Firefox Crashing On Startup

Mozilla Firefox is another amazing browser option for Mac and iOS users. We have all had our browsers crash at some point in our lives, and it is very typical. But, if the crashing occurs almost all of the time, this is already a significant concern. But first, what is the problem with Firefox crashing on startup, and how to remove Firefox?

A “browser crash” occurs when a browser is unexpectedly closed or closed completely during any activity. When a browser fails, you’ll get a pop-up crash report window, which you may use to find out what happened. 

According to recent reports, the Mozilla Firefox browser is suffering from regular crash troubles, which users are finding more difficult to bear. But, of course, having this happen to you is a bad user experience, and it’s just as frustrating as running out of application memory on your computer. 

However, there are several viable solutions to fixing Firefox that keeps crashing on Mac that you should consider.

What should you do if Firefox keeps crashing on a Mac computer?

Don’t get too worked up if your Firefox keeps crashing on you. We will assist you in getting over this problem and resolving it as quickly as possible. In addition, the Mozilla Foundation has provided some helpful suggestions to resolve Firefox crash issues.

1. Install the latest version of the Firefox browser.

Bugs in the current version of the software that you are running might potentially create the problem of crashing. First, try to see if there is an available update for your Firefox browser to see if it would resolve the issue.

  • Select the menu option to access the menu.
  • You can access help by clicking on the Help button.
  • Scroll down to the section under “About Firefox.”
  • Allow Firefox to check for updates and scan for them.
  • To update Firefox, select “Restart” from the drop-down menu.

Eventually, the Firefox browser will restart and load the most recent version, which will prevent crashes from occurring again in the future. Remember to only download the most current version of Firefox from the official website to avoid malware attacks. 

2. Update your Mac operating system.

Some web browsers may potentially crash due to your computer’s operating system. Follow these steps to upgrade your computer’s operating system to resolve Firefox’s tendency to crash on Mac computers.

3. Update plugins.

If you have previously updated both the Firefox browser and the operating system on your computer and Firefox keeps crashing, check to see if any of your plugins need an upgrade to resolve the issue. Then, check the website of the plugin you’ve installed for the most recent version and download and install it on your browser.

4. Security software should be updated.

It is also feasible for your internet security software to halt your online surfing activity at inconvenient times. This might be a warning that your anti-virus software is outdated and requires an update. To resolve this, navigate to the settings of your anti-virus program and check for the most recent updates, then follow the instructions on how to install them.

5. Remove all cookies and caches from your computer.

Too many cookies and caches in your Firefox can cause various issues, including crashing, slowness, and even the inability to open. Because of this, it is preferable to delete certain cookies and caches at a specific time:

  • Open Firefox and select “Library” from the menu bar in the top-right corner.
  • Select History from the drop-down menu, followed by Clear Recent History.
  • Select Cookies and Cache from the drop-down menus and click OK.

We propose that you rely on a better solution, such as cleaners, to avoid the problem of Firefox or other browsers crashing repeatedly. It is safe and effective to use iMyMac PowerMyMac, which automatically scans and finds any junk files that need to be removed, analyzes and cleans your computer’s system, and does various other tasks.

Use PowerMyMac to quickly and efficiently erase the cookie and cache files to prevent Firefox from not functioning on your Mac.

6. Enable Safe Mode in Firefox.

If the issue persists after restarting Firefox in Safe Mode, it’s possible that the issue is more complicated than a simple crash.

7. Re-install Firefox.

If using Safe Mode doesn’t help, why not try a fresh install and see if the problem persists? Your personal files and bookmarks are kept secure in a separate area.

  • Delete the Firefox installation directories (C: Program Files Mozilla Firefox and C: Program Files (x86) Mozilla Firefox) from your computer. 
  • Next, install the latest version of the Firefox web browser. 
  • Follow the on-screen instructions to complete the installation. 
  • Finally, examine whether the problem persists after installing a completely new and clean browser.

8. You should report crash errors.

You may report that Firefox keeps crashing issues directly to the developers, which will help you obtain a more accurate response. All that is required is that you write down the crash ID.

9. Check the hardware.

Although it is the least likely problem, your hardware might cause problems with how the browsers operate. In addition, because of the limited amount of RAM available, apps, software, and services you are currently using on the device may crash. You may check your RAM’s performance with the Memtest86+ utility.

Problem with Firefox crashing on startup

Here’s how to fix it.

If your Firefox continues to crash on startup, and you’ve tried all you know to fix it, but it still doesn’t work, you may find yourself losing all patience very quickly. Don’t worry; we have methods that Mozilla has recommended to assist you in getting Firefox operating again.

  • If Firefox is not already operating in Safe Mode, this should be your first point of troubleshooting.
  • To do this, open Firefox in Safe Mode and then see if Firefox is still crashing. 
  • If Firefox crashes while in Safe Mode, you must re-install Firefox from scratch.
  • Last but not least, Firefox may crash when it first starts up due to viruses or spyware. 

How to remove Firefox from Mac

  • First, copy the important Firefox data, like website logins and bookmarks, and then completely close it.
  • Launch the Finder now. 
  • Then, go to the Applications folder and look for the apps you want. It’s a good idea to put Firefox in the Mac trash.
  • Right-click Firefox and choose to move it to the trash.
  • Go to the “Go menu” and select “Go to Folder” from the list.
  • Go to the library folder on your Mac and look for the file you want. 
  • Then, type “Library” and click “Next.”
  • Take a look at the Application Support folder now, and move the following folders to the trash: Firefox, Mozilla. Ensure that the Mozilla and Firefox folders are gone from the Applications Support folder. 
  • Then, open the caches folder, and delete all the files there. 
  • Go to the Caches folder, then delete the following folders: Mozilla and Firefox. Deleting the Mozilla and Firefox folders in your Mac’s cache folder will make it run faster. 
  • Then, delete the Mozilla PList file from the Preferences folder.
  • Remove the Mozilla Plist file from the Preferences folder and move it to a different location.
  • When the MacBook is done, empty the trash. Then restart it to see if the flickering screen is gone. 
  • Also, check for malware or virus.
security software for mac
Security Software For Mac/PC

Why does Firefox keep crashing on my Mac?

Too many cookies and caches in your Firefox can cause various issues, including crashing, slowness, and even the inability to open. Because of this, it is preferable to delete certain cookies and caches at a specific time: Open Firefox and select “Library” from the menu bar in the top-right corner. Next, select History from the drop-down menu, followed by Clear Recent History.

Should I use Firefox or Safari on my Mac?

Your circumstances dictate what you need at the end of the day. Safari is the obvious pick if you want a browsing session that is both quick and comfortable. Safari on the Mac is extremely fast and has excellent security protection built-in. Firefox is your best buddy if you want greater personalization while still minimizing the chance of being tracked. 


Again, simply running a thorough check on your laptop to identify any malware or software that may be causing the crash problem and removing it would suffice. Creating a new user account on your MacBook is an option if the problem persists after deleting the programs that are causing it.


Eddie Mcfarren

Eddie Is no stranger to technical writing after spending years in Networking, IT Infrastructure management, and online content marketing. He is an avid researcher, Software and apps dev tester who spends hours solving problems behind the scenes. Get in touch with him via social media and you can email him via

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