An outage currently seems to affect all Firefox users. Unable to access any website.

The problem seems to be related to HTTP3 support in the browser. It’s not yet known exactly what Mozilla has done wrong, but if you’re currently having the problem, here’s a way to fix it.

Edit2 : The problem seems to have been solved by Mozilla.

Edit1 : A ticket has just been created on Bugzilla . It seems to be related to data collection. To deactivate it:

Type in the URL bar:


or go to preferences -> Privacy and security and disable data collection:

Otherwise, another workaround:

Type in URL bar


Click the blue warning button, then find the key


Set it to ”  False  ” by double clicking on it.


Then restart your browser.

Good luck. I’ll edit this article when we can all re-enable HTTP3.

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About the Author

SAKHRI Mohamed

Founder & Editor

Passionate about the web, new technologies and IT, I share on tutorials, tips, advice, online tools and software for Windows, Mac and Linux. I'm the founder of this blog and I'm very interested in anything to do with technology, but I also love playing games. I was born in Constantine, but now I live in Algiers/Algeria

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