Nine years later, bug which breaks bookmarklets still unfixed in Firefox

App Nap support still not added after 8 years also https://bugzilla.mozilla.org/show_bug.cgi?id=931651

For anyone seeking a workaround, it is to disable CSP:

    security.csp.enable = false

All I want is to clip text selection to my notes.

Of course, I would never suggest that this bug in basic functionality which breaks compatibility with previous versions AND other browsers is more important than redesigning the UI multiple times.