Mozilla Firefox won't load websites, here's how to fix the bug

Updated January 13, 2022 at 8:15 AM: Mozilla believes that it has fixed the issue and that restarting Firefox should "restore normal behavior" of the browser.

What you need to know

• Mozilla Firefox isn't loading websites for some users.
• The problem causes an infinite loading loop and Firefox to not load any web pages.
• There isn't a permanent fix for the issue yet, but there is a workaround that will work in some cases.

Mozilla Firefox has an issue that prevents websites from loading at the moment. Those affected by the bug will see an infinite loading loop on tabs and the browser failing to load any pages. The browser's implementation of HTTP3 appears to be the root of the problem. While there isn't a permanent fix from Mozilla for the bug, there is a workaround that will help in some cases.

Since HTTP3 is related to the issue, you can simply disable it. This shouldn't affect the browsing experience much as there aren't many websites that require HTTP3 right now.

You can disable HTTP3 by following these steps:

1. Open Firefox.
2. Type about:config in the address bar.
3. Select Accept the Risk and Continue.
4. Type network.http.http3.enabled in the configuration's text bar
5. Change the setting for network.http.http3.enabled to "false" by clicking the icon on the right.
6. Restart Firefox.

Twitter user @iamPrateeshRK shared a video of these steps as well.

This workaround should mitigate the issue on Firefox on Windows, Linux, and macOS.

Mozilla announced a fix for the issue at 8:06 AM EST on January 13, 2022:

Alternatively, you could use a different browser, such as Microsoft Edge, Chrome, or Vivaldi. Note that the iOS version of Firefox is not affected by this bug as it uses WebKit.

This is a developing story, and we will add more details as they become available.