this post was submitted on 05 Feb 2025
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After creating a fresh installation of Ubuntu 24.04, I installed DEB Firefox from APT by following Mozilla's instructions from here. But I noticed that it was secretly replaced with Snap Firefox. I was able to verify this by checking the About Firefox page. This is the third time I noticed this.

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[–] [email protected] 12 points 6 hours ago (2 children)

I suspect that what's happened is you installed the apt version, then at some point upgraded it and there was a version in the main repo that had a higher version number and installed the snap version. If two repositories both have a package with the same name, and no other rules in place, the higher version number wins.

If that is the case, you need to pin the firefox package to the mozilla repository. You can find more details here: https://wiki.debian.org/AptConfiguration

[–] [email protected] 1 points 4 hours ago

This explains situation.