Right-click on the Desktop and choose Create a new launcher here.

Sudo ln -s /opt/firefox/firefox /usr/bin/firefox-esr52 (Replace firefox-52.9.2 file name for your version) Open terminal in the Download directory and extract archive to /opt: This method works in Linux Mint Cinnamon and with slight variations in m any Ubuntu and Debian based systems: Set the update preferences to 'Never check for updates to prevent autoupdate to Firefox 60 and later. To restore Firefox 52.9 ESR after its automatic update to Firefox 60.x That's because Mozilla folks are disabling add-ons' versions. Once this happens, users will no longer be able to download their extensions. All classical (legacy) add-on versions will be disabled in October, 2018 and won't be available anymore. Simultaneously Mozilla will start to disable legacy add-ons on. Firefox ESR 52 is the final release that is compatible with legacy add-ons. By closing support to Firefox 52.9 ESR this September, Mozilla finally abandoned all XUL overlay, bootstrap and jetpack extensions.

Mozilla firefox 52 esr