- Mozilla Firefox is a great browser with millions of users worldwide and a strong focus on privacy.
- Unfortunately, errors can sometimes appear, but you should be able to fix them with this article.
- Take a look at other Firefox errors in case you are looking for something more specific.
- Want to learn more about Firefox? Be sure to check our Firefox hub, for more in-depth guides.
Firefox is known as one of the best browsers for the Windows platform, but unfortunately, it seems that Windows 10 users are having certain issues with it and now Firefox is not working for them.
Firefox is one of the most used web browsers in the world, and this application has been around for years.
How do I fix Firefox not working on Windows 10?
Firefox issues can be problematic, and prevent you from using your browser. As for issues, we’ve compiled a list of common problems that users reported with Firefox:
- Firefox won’t open – This issue can occur if there’s a problem with your Firefox profile. To fix it, simply recreate the profile and check if that solves your issue.
- Firefox too slow, using too much RAM – High RAM usage can occur due to your extensions, so be sure to disable all extensions that you don’t need and check if that helps.
- Firefox high CPU usage – Sometimes high CPU usage can appear and cause issues with Firefox. This can be due to your antivirus, so be sure to disable it temporarily.
- Firefox keeps crashing, freezing, not responding – Sometimes your configuration can cause problems with Firefox. However, you can fix that problem simply by starting Firefox in Safe Mode.
1. Use a different browser
If you can’t seem to escape the fact that Firefox is not working on Windows 10 as it should, then we recommend switching to another browser. These days, you truly have options.
Let’s go with the one that makes the most sense: the Opera browser.
It is based on Chromium, so it will be compatible with all and any websites. It has been modified to include a lot of new and different functionalities.
Some of the best that we like are:
- Workspaces: group a bunch of tabs together in a workspace to keep yourself better organized
- Free VPN: a proxy-like VPN that is free and comes with unlimited bandwidth
- Integrated Messenger: reach out and chat with friends on Facebook Messenger, WhatsApp and more without leaving the browsing or switching tabs
And many more just like this.
Opera
Efficient browser, better than Firefox. Give Opera a try and see how good it is.
2. Check your antivirus
If you’re experiencing Firefox issues on your PC, the issue might be your antivirus software. Several users reported that HTTPS Scanning feature in Avast caused issues with Firefox, but you can fix this problem by doing the following:
- Open Avast from and choose Settings in the bottom left corner.
- Choose Components > Web Shield.
- Now click Customize button.
- Uncheck Enable HTTPS Scanning option and save changes.
If you’re using different antivirus software, you might want to try disabling this or other similar features in it. In case that doesn’t work, your next step would be to completely disable your antivirus software.
Several users reported that this wasn’t effective, and according to them, they managed to fix the issue by removing their antivirus altogether.
If removing the antivirus solves your problem, you should consider switching to a different antivirus solution. Which one? We recommend BullGuard.
Bullguard offers multi-layered protection with the power from the cloud and machine learning.
With a very clean user interface, it manages to pack a punch in terms of features.
Here’s what you get:
- award-winning antivirus
- firewall and parental controls
- silent detection mode
- browser link checking
Try it now to get rid of the Firefox issues.
BullGuard
Switch to BullGuard to stop your current antivirus from interfering with Firefox
3. Reinstall Firefox
If Firefox issues are interfering with your work, perhaps you should try reinstalling Firefox. Sometimes your installation can get corrupted, and that can cause various issues. However, you can fix that problem, simply by reinstalling Firefox.
There are several methods that you can use to reinstall Firefox, but the most effective one is to use uninstaller software.
In case you don’t know, uninstaller software such as Revo Uninstaller completely removes any application from your PC.
In addition, this software will also remove all files and registry entries associated with the application you want to remove ensuring that these files don’t interfere with your system.
This is a tool you definitely need on your PC especially if you often install and uninstall various software. It works great with native Windows Apps, or stubborn apps that fail to uninstall by forcing them to be removed.
Revo Uninstaller
Take advantage of this sale and get Revo Uninstaller Pro at a special price. Completely and safely uninstall any software.
Once you remove Firefox, install it again and check if the problem is still there.
4. Disable problematic add-ons
- Open Firefox and click the Menu button in top right corner.
- Choose Add-ons from the list.
- Click the Extensions tab on the left. A list of installed extensions should open.
- Now disable all extensions by clicking the Disable button.
- Restart Firefox and check if the issue is resolved.
- If the problem is fixed, you can try enabling extensions one by one until you find the one that is causing you problems.
According to some users, the add-on that caused the crash for them was FlashGet, but bear in mind that almost any add-on can cause Firefox to crash, so you might have to disable or remove certain add-ons in order to fix this issue.
If you can’t open Firefox at all, it’s always a good idea to run it from Safe Mode. To access Safe Mode do the following:
- Press the Start button, click the Power button, press and hold Shift on your keyboard and choose the Restart option.
- Once your computer restarts, choose Troubleshoot > Advanced options > Startup Settings and click the Restart button.
- After your computer restarts again press F5 to choose Safe Mode with Networking.
- When Safe Mode starts, try disabling any extensions from Firefox by following the steps above.
If Firefox works normally in Safe Mode, the issue is probably caused by some third-party program that you have installed, so you’ll have to find the problematic program and disable it in order to fix this problem.
5. Start Firefox in Safe Mode
- Locate the Firefox shortcut on your desktop, hold the Shift key and double-click it.
- When the dialog box appears, click Start in Safe Mode button.
After doing that, Firefox should start in Safe Mode. If the issue doesn’t appear in Safe Mode, it’s possible that one of your extensions or settings are causing this issue.
FAQ: Learn more about Mozilla Firefox
- How do I remove malware from Firefox?
To remove malware from Firefox, press Ctrl + Shift + A to open the extensions page. From there, remove all suspicious extensions that you don’t recognize or remember installing.
- Does Firefox have virus protection?
Yes, Firefox has a Phishing and Malware protection feature that will provide you basic protection against malicious websites.
- How do you reset the Firefox browser?
To reset Firefox, click the Menu icon and choose Help > Troubleshooting Information. Now click on the Refresh Firefox button and follow the instructions on the screen.
- How do you do a clean install of Firefox?
To clean install Firefox, you need to go to Settings app > Apps and uninstall Firefox from there. Now go to c:Users<your_username>AppDataLocalMozilla and remove the Mozilla folder. After doing that, download and install the latest version of Firefox.
Editor’s Note: This article continues on the next page.
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