Is Firefox 68 Still Supported?
Firefox 68.12 ESR will be the last update for the Fx 68.0 ESR channel and will be out along with Fx 78.2. 0 ESR and Fx 80.0 Release on Aug 25. When Fx 81.0 Release and Fx 78.3 ESR are out the the older Fx 68.0 ESR channel will be End Of Life or EOL.
By March 2020, according to the US federal government's Digital Analytics Program (DAP), which gives us a running count of the last 90 days of US government website visits, Firefox market share had dropped to a mere 3.6%. As of December 9, 2020, only a few months later, Firefox's share was down to merely 3.4%.
Endangered Firefox: The state of Mozilla | ZDNet
On the menu bar, click the Firefox menu and select About Firefox. The About Firefox window will appear. The version number is listed underneath the Firefox name. Opening the About Firefox window will, by default, start an update check.
Find what version of Firefox you are using - Mozilla Support
What is the current version of Firefox?
What's the latest version of Firefox?
What is the latest version of Firefox? - WhatIsMyBrowser.com
What versions of Firefox are still supported?
There are only 2 currently updated and supported Released versions, Firefox 9.0. 1 and Firefox 3.6. 25.
Supported Versions | Firefox Support Forum | Mozilla Support