Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, CSP bypass or session fixation. Debian follows the extended support releases of Firefox. Support for the 91.x series has ended, so starting with this update we"re now following the 102.x releases. Between 91.x and 102.x, Firefox has seen a number of feature updates. For more information please refer to https://www.mozilla.org/en-US/firefox/102.0esr/releasenotes/