This seems to have been an issue since October 2018: <a href="https://discussion.evernote.com/topic/116509-firefox-support-for-new-web-version-updates/" rel="nofollow">https://discussion.evernote.com/topic/116509-firefox-support...</a>.
Dump Evernote, embrace Tiddlywiki. Only emacs and nvim ever make me think otherwise (and they can be integrated into your workflow). Here's mine: <a href="https://philosopher.life/" rel="nofollow">https://philosopher.life/</a>