[noisem4ker]

PPA for .deb Firefox (from Mozilla Team): https://launchpad.net/~mozillateam/+archive/ubuntu/ppa

Make sure to pin it and/or neutralize snap so it takes precedence.

[usr1106]

Thanks for the pointer.

I guess it's unlucky that they call the package firefox. Calling it something unique would make pinning unnecessary and popcon results correct.