You are being unlucky is what you are doing wrong. The changes on YT are not being rolled out to all users at the same time. You could just be in a location or in a part of the network where changes are applied first. Nothing you can do to change that, just wait for the filter lists to catch up. Or migrate to piped or Invidious.

This whole "Firefox, Firefox, Firefox" chanting as if it prevents the ad block detection is ridiculous. The reason why FF users got spared for longer is because the marketshare of FF is so low, that it took longer until most of them were affected purely based on random chance.

I use Chrome on my work laptop and FF on my PC and I either get the detection message on both or I don't get it on either device.