Only reason they are seeing so many uninstalls is because ublock origin is the big one that works and that requires uninstalling other blockers to get it to not be detected.
Ublock origin doesn’t track uninstalls but it has gained quite a few users in the last 8 days
vs
https://addons.mozilla.org/en-GB/firefox/addon/ublock-origin/
Youtube is not ahead as of now, you can check on this website: https://drhyperion451.github.io/does-uBO-bypass-yt/ It also links to a guide.