Ubuntu tends to keep Firefox up to date, although I haven't used Ubuntu for a few months already. But regardless, this is the "official PPA" for the Beta chann

Ubuntu tends to keep Firefox up to date, although I haven't used Ubuntu for a few months already. But regardless, this is the "official PPA" for the Beta channel: https://launchpad.net/~mozillateam/+archive/ubuntu/firefox-next https://launchpad.net/~mozillateam/+archive/ubuntu/firefox-n...