Advice for Firefox users. DON'T update Firefox. The most recent update 27/10/23 seems to do nothing except stop many add-blockers from working. Strongly suggest you dismiss the most recent update if you use an add-blocker. If you have already downloaded and installed you can undo it by following the instructions here: https://support.mozilla.org/en-US/questions/1244968.
Hope this helps people who don't need add spam every 5 minutes of work/play on the internet.
I only use Firefox for testing or certain extensions. All my serious adblocking is done on Safari. Though I noticed it hasn't got rid of the ad blocker nag on YouTube :(