: Building on Total Cookie Protection , this release improved logic for clearing cookies to prevent data leaks between websites.
To ensure a secure installation, always use official Mozilla sources: download firefox 91.2.0
While the standard version of Firefox updates every four weeks, the ESR branch follows a much slower feature cycle. Key reasons to download this version include: : Building on Total Cookie Protection , this
Firefox 91.2.0 inherited major upgrades from the base Firefox 91 release while focusing on stability. Notable highlights include: : Building on Total Cookie Protection