Mozilla sent Firefox Version Version 82.0.3 to the release channel today to fix a critical security vulnerability. Firefox ESR was updated to Version 78.4.1.
Update: To get the update now, select "Help" from the Firefox menu, then pick "About Firefox." Mac users need to select "About Firefox" from the Firefox menu. If you do not use the English language version, Fully Localized Versions (https://www.mozilla.org/en-US/firefox/all.html) are available for download.
Security Updates (https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/)
Release Notes (https://www.mozilla.org/en-US/firefox/82.0.3/releasenotes/)