No. Firefox will drop support for the Flash plugin with Firefox 85 (January 26, 2021), but there's a cutoff date of January 12, 2021 in the plugin itself, after

No. Firefox will drop support for the Flash plugin with Firefox 85 (January 26, 2021), but there's a cutoff date of January 12, 2021 in the plugin itself, after which it will not work even in earlier versions of Firefox. https://support.mozilla.org/en-US/kb/end-support-adobe-flash https://support.mozilla.org/en-US/kb/end-support-adobe-flash