Two versions of firefox are there. How to keep older and remove newer version?
Currently in my Linux Mint, I have two versions. My Firefox was updated from Update Manager and updated to 53.0. However, Since I need 52.0 version for my testing, so I manually got the tar file from Mozilla FTP server and did what was suggested from Mozilla article: https://support.mozilla.org/en-US/kb/install-firefox-linux
Now the problem is, I need to make 52.0 one as default and need to remove 53.0 version. How can I do it?
Alla svar (1)
If the Firefox 53 version is installed via the software management of your Linux distribution then you need to uninstall that version from there. If you installed the version yourself by extracting files to a specific installation folder then just remove/delete this folder if you do not want to use that version. Note that there is nothing wrong with having multiple Firefox versions like the release and a Firefox 52 ESR version in case that is the version you mean with Firefox 52. You can let Firefox set itself as the default browser ("Options/Preferences > General") or use your Linux application (e.g. Gnome Control Center) that manages default applications to set a specific Firefox version as default browser.