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Firefox browser extremely slow, but not chrome

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I've been using firefox for many years now without any trouble. But just last week, I found it takes a very long time to load even a simple web page. For example, takes 4-5 minutes to just show the text, and 7-8 minutes to fully load. I also use Chrome and it does not have this problem. I've already tried "refresh firefox", and uninstalled all plugins, and it is still slow. I am using Firefox version 78.0.1 (64-bit) and using Windows 10.

All Replies (5)

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Hi, This article will help: Quick fixes if your Firefox slows down


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So I tried all these things from the article but I still have the problem:

- Update Firefox: It was already updated.

- Update your video drivers: There was no new driver.

- High hardware resource usage: CPU usage is low (2%). Memory usage is low.

- Firefox hangs or stops responding: That's not my problem.

- I get a Warning Unresponsive script error: I don't get this error.

- Firefox takes a long time to start up: That's not my problem.

- Check if you have malware on your computer: I ran a malware check and found nothing.

- Optimize Windows: My computer isn't slow in other areas, so I did not do this.

- Block unneeded content: I have a fresh install, so does not apply.

Modified by BluePenguin


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I think I solved the problem. I found this suggestion on the web: Go to “about:preferences”, navigate to bottom of the page under “General” section and click on the “Settings” button for “Network Proxy” option. Choose “No proxy” option and click “OK”.

Once I did this, Firefox now works fast.

What does this setting do? I am not familiar with "proxy" and have never used it or changed its settings.


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What were your previous connection settings ?
Were you using a proxy ?

("Use the system proxy settings" is usually the default and should work unless there is a problem with the connection setting)

You can boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.


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cor-el: It was originally set to "use system proxy settings". I did try booting in safe mode with network support and that did not solve the problem.

Also, before I set the "No Proxy" setting in Firefox, I checked my Windows 10 settings and the proxy settings was set to "automatically detect settings". I turned this off. Also, under "Manual Proxy Setup", the "Use Proxy Server" was already set to "off", so I left it (set to off). Then I tried Firefox again, and it still had the slow problem. It wasn't until I set the setting within firefox to "No Proxy" that the problem was fixed.


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