My mother was complaining of threats by Youtube and Facebook to stop supporting her current version of Firefox so I tried to install the new version: I first downloaded the file firefox-26.0.tar.bz2 then I deleted the existing form of Firefox. I tried to look up tutorials, on my laptop, to install the new version with the terminal but no command on any tutorial yielded anything but an error message, command not found, no existing directory, all that jazz. Then I decided to install another browser in the hope that it would be capable of updating itself as Firefox was not, I was unsuccessful in this endeavor seemlingly because the Add/Remove Applications thing seems to require the internet, and, having deleted Firefox, it was unable to reach the internet.
I guess I don't actually need Firefox 26, I just need some web browser that can be installed on Hardy Heron and can get updates and the updated flash player so it can continue to play videos and games on Facebook. I am fairly inept at this stuff so I request that any explanations of how I should go about achieving this goal be phrased very simply so I don't mess it up.
Thank you for the help in advance.