I think you can edit your post on Lemmy to correct it.
You would have to be looking for it:
Note that the warning appears in the Extensions popup rather than on the Extensions icon, so you wouldn’t know that StopTheMadness was disabled on YouTube unless you opened the popup (or unless you saw the autoplaying videos on YouTube that StopTheMadness would otherwise stop.)
What happens, though, if you pin the extensions to the toolbar for easy access to their settings?
It turns out that when you pin an extension to the toolbar, it no longer appears in the Extensions popup! Consequently, the quarantined domains warning no longer appears in the Extensions popup either. In fact, there’s no longer an Extensions popup: clicking the Extensions toolbar icon simply opens the
about:addons
page, which doesn’t show the quarantined domains warning anywhere.
One of the founders of Ferrous Systems has answered some questions about it on Hacker News. See here and here.
The spec they created for the certification process is open source. There is some “tiny” amount of the patches that aren’t public but it sounds like it is essentially a recent stable release of Rust because the other major changes have been contributed upstream. It’s not clear if they definitely plan to eventually release the rest of thier changes as open source or not but they will consider it.