I'm unable to install some scripts (with Tampermonkey I can)

Not a bad addon for when you're reinstalling Tampermonkey. If it weren't for the lack of a running script counter, the large unnecessary list of freshly uploaded scripts instead of a normal control panel, the weakly visible switching of script activity from light-gray to middle-gray, I would have stayed with my old favorite. But no, it's time has passed, I choose crispness and clarity.

Lacks some features, which alternative script managers have, like options for scripts or wider scripting API.

verynice

Used to be 5 stars. Then WebExtension completely hamstrung it. You can't install scripts manually anymore, and some scripts stopped working altogether.