How to fix firefox running slow?

Solution 1 – Change your power settings to High Performance

Many users reported that Firefox is running slow on their PC, and this issue is most often caused by your power settings. According to users, Windows 10 sometimes changes your power plan to Power Saving once your upgrade to it, so it’s advised that you change your settings to High Performance. To do that, follow these steps:

1. Press Windows Key + S and enter power settings. Choose Power and sleep settings from the menu.
   

    2. Now select Additional power settings.

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.

Solution 2 – Switch to a different theme

This is a possible workaround, but few users reported that it works, so you might want to try it. According to users, switching to a different, less demanding theme fixes issues with slow Firefox on Windows 10. Users reported that using a theme such as High Contrast theme fixed all slowdown issues for them.

By changing the default theme to less demanding one, Firefox might not look visually appealing, but it should work faster than before. To change your Firefox theme do the following:

1. Open Firefox and click the Menu button in the top right corner and choose Add-ons.

      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.

Solution 3 – Check your antivirus

If Firefox is slow on your Windows 10 PC, the problem might be your antivirus. Antivirus tool is a necessity, but sometimes your antivirus 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 can also 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 your settings fixes the problem. Several users reported that disabling Active Protection feature fixed the problem for them, so you might want to try that.

Solution 4 – Change your settings

If your Firefox is running slow, the problem might be your settings. Sometimes certain Firefox services can interfere with Firefox and cause slowdowns to occur. However, you can fix that by doing the following:

1. Click the Menu button in the top right corner and choose Options from the menu.
   

2. Select Privacy & Security from the menu on the left. Now scroll down to Permissions section and make sure that Prevent accessibility services from accessing your browser option is disabled.

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

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