Ubuntu updating firefox
Can forced auto-updating be prevented in any other way?
That would probably produce the error you're getting. Where have you put the Firefox files, and how did you get them (I'm guessing you downloaded a tarball from mozilla.org)?How To Update Latest Version Of Mozilla Firefox On Ubuntu,mint ,suse, Debian, lubuntu, kubuntu17.04,16.04,12.04,14...How Install Firefox 58 Quantum On Linux Mint, Ubuntu Debian Based Linux Download Link And Detailed Article here: Open Ubuntu software center and click on Updates tab and you will find available upgrades for all of your software applications.
Be sure to check every week (or two) for new updates to stay secure.
How to install Mozilla Firefox in Ubuntu using terminal.