How to use an older version of firefox in Ubuntu 16.04?
22276
How do I downgrade Firefox v. 57 to v. 56?
20122
Firefox doesn't launch in Ubuntu 13.04
144800
How to enable Moonlight/Silverlight 5 on firefox?
57341
Firefox 37.0.2 not opening (removing firefox did not help) runing ubuntu 14.04 LTS
1520
How to install software or upgrade from an old unsupported release?
107247
Firefox application associations not working in the 'Downloads' window
143713
Upgrading Firefox fails. lzma error: compressed data is corrupt
66833
How to switch Firefox channel to Stable?
130747
How do I use the chrome driver in Ubuntu 16.04?
80975
How to detect my browser version and operating system using JavaScript?
50559
All of my Firefox add-ons have been disabled suddenly, how can I re-enable them?
20748
How do I change my default browser?
118790
Windows 10 won't accept Firefox as the default browser
72489
How can I watch Amazon Prime videos using Firefox on Ubuntu 16.04?
120077
Why is Chromium not updated automatically as Firefox is?
27241
How to trigger a check for updates in Firefox programatically or from a command line?
82950
How do I install Waterfox?