Revert to Previous Mozilla Firefox

[UserJB]

I'm running Ubuntu 16.04. A few weeks ago,an update installed a new version of Mozilla Firefox: 80.0. This version crashes every 10 minutes. How can I revert to a previous version? I'd like to do it through the apt tools.

[walts48]

I'm running Ubuntu 16.04. A few weeks ago,an update installed a new version of Mozilla Firefox: 80.0. This version crashes every 10 minutes. How can I revert to a previous version? I'd like to do it through the apt tools.

Can't help, but Mozilla recently released an update to 80.0.1 that Ubuntu should pick up.

Fixes a crash problem.

https://www.mozilla.org/en-US/firefo.../releasenotes/

Do you get the crash reporter and submit reports to Mozilla?

[Impavidus]

There's no revert built-in, except for the kernel. The Firefox that came with the original release of Ubuntu 16.04 should still be available from the xenial/main repository (Firefox 80 comes from the xenial-updates/main repository), but that version must by now be ancient. It may be possible to grab a version from a livedisk or, with some luck, the previous version of Firefox may still be in your package cache (/var/cache/apt/archives/firefox*).

But it would be much better to upgrade to a version where this bug is fixed.

[mikewhatever]

You may just want to uninstall the new Firefox, and use "firefox-esr" from this PPA: https://launchpad.net/~mozillateam/+archive/ubuntu/ppa.
The ESR version has less changes, and should work better on an old OS.
PS: It is time to upgrade.

[Dennis N]

You can download most past Firefox releases from the official Mozilla archive:
https://ftp.mozilla.org/pub/firefox/releases/
installation with a package manager is not necessary for these.

[Impavidus]

Can't help, but Mozilla recently released an update to 80.0.1 that Ubuntu should pick up.

Ubuntu picked it up. I just installed 80.0.1 from the repositories. That may be the simplest way to solve the problem.