Thanks for your reply. I feel a bit silly now. I just learned that I have Firefox ESR, which is different from Firefox: https://support.mozilla.org/en-US/kb/wh

Thanks for your reply. I feel a bit silly now. I just learned that I have Firefox ESR, which is different from Firefox: https://support.mozilla.org/en-US/kb/where-find-release-notes-firefox-enterprise https://support.mozilla.org/en-US/kb/where-find-release-note... https://www.mozilla.org/en-US/firefox/91.5.0/releasenotes/ https://www.mozilla.org/en-US/firefox/91.5.0/releasenotes/ I just assumed I downloaded the regular Firefox release, but evidently not.