Mozilla Firefox is too slow? Here’s how to speed it up

Milan Stanojevic
by Milan Stanojevic
Deputy Editor
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  • Mozilla Firefox is a great browser, but it doesn’t mean that it isn’t prone to issues. Some users reported that Firefox is slow on their PC.
  • If you’re having this problem too, make sure your antivirus isn’t interfering and update Firefox to the latest version.
  • Another option is to switch to a different browser. Opera cannot disappoint you in that regard.
  • This article is just a part of our Firefox Hub, so be sure to check it out for more useful tips and tricks.
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  • Download Opera

Firefox is one of the most popular browsers on the Windows platform, but despite its massive popularity, Firefox still has certain issues on Windows 10.

Many users are complaining that Firefox is slow on Windows 10, and this can be a major problem if you use Firefox as a default browser on Windows 10, but fortunately, there are few solutions available.

What can I do if Firefox is slow on Windows 10?

1. Switch to another browser

try out Opera

When Mozilla Firefox is too slow, Opera is one of the best alternatives to think of. This browser is widely used and mainly in Windows, when other options fail to meet expectations.

All you need to do is to enable TURBO mode and this will make surfing the Internet even faster than usual. Even more, there’s no limit for speed dials to worry about.

Alike Firefox, expect getting extensions and add-ons, instant tab preview, and crypto mining protection.

However, Opera is the one that truly has an impressive track record when it comes to security, with free VPN and a Crypto Wallet to take advantage of regularly.



If Firefox fails to meet your expectations, consider using a great alternative. The Opera browser won’t disappoint you!
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2. Check your antivirus

use BullGuard

If Firefox is slow on your Windows 10 PC, the problem might be your antivirus. The antivirus is a necessity, but sometimes it can interfere with your web browser and cause slowdowns.

Many antivirus tools also tend to install various extensions in order to offer extra protection, but these extensions often slow down your browser.

If Firefox is running slow, be sure to remove any extensions that are installed by your antivirus. These extensions aren’t mandatory, so you can disable or remove them without fear.

In addition to extensions, you might want to check your antivirus settings and see if modifying them fixes the problem.

Several users reported that disabling the Active Protection feature fixed the problem for them, so you might want to try that.

As a last solution, you might have to uninstall your antivirus in order to fix the problem. Many users reported issues with Norton antivirus, but after removing it, the problem was completely resolved.

If you decide to remove your antivirus, you should definitely consider switching to a new antivirus solution. There are many great antivirus tools on the market, yet the best one clearly remains BullGuard.

Besides the fact that it provides great security and anti-malware protection, rest assured that it won’t interfere with your browser in any way.



A top antivirus that never interferes with your browser is the powerful BullGuard. Try it out right away!
$23.99/year Get it free

3. Change your power settings to High Performance

  1. Press Windows Key + S and enter power settings. Choose Power and sleep settings from the menu.
    Firefox slow playing videos
  2. Now select Additional power settings.
    Firefox slow crashing
  3. Once the Power Options window opens select High-Performance profile.

We have to mention that switching to High-Performance mode will drain your battery faster due to increased power consumption, but Firefox should be working without any slowdowns.

4. Switch to a different theme

  1. Open Firefox and click the Menu button in the top right corner and choose Add-ons.
    Firefox Quantum slow Windows 10
  2. Select Get Add-ons tab on the right and click Featured themes.
  3. Try to find a simple theme that won’t use too much of your resources and install it.

This is just a potential workaround, but few users reported that it works for them, so you might want to try it.

5. Change your settings

  1. Click the Menu button in the top right corner and choose Options from the menu.
    Firefox slow to load pages Windows 10
  2. Select Privacy & Security from the menu on the left. Now scroll down to the Permissions section and make sure that Prevent accessibility services from accessing your browser option are disabled.
    Firefox slow not responding

After disabling this option, check if the problem with Firefox is resolved.

Editor’s Note: This article continues on the next page.

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Editor's Note: This article was originally published in May 2016 and was revamped and updated in November 2020 for freshness, accuracy, and comprehensiveness.
  • it did not resolve my problem. it is still too slow. it takes about 20 minutes to load google home page! and I do not have this this in the Options “Prevent accessibility…etc” !!?? I have the latest update 84. which version are you referring to?

  • I got the “buy me”. Next step = uninstall.. I have been putting up with all the crashes for a long time and I guess I can put up with it.

  • Tried this, but if i wanna have the promised fix i need to have the credit card ready…
    Also the software comes with a lot of extra unwanted things… (buy me, buy me, buy me).
    So i chose to uninstall and look for better options, in the uninstall process the browser opens again and again to change my mind. This is for sure not what i was looking for, haha 🙂