For anyone interested, tomorrow I will try to build Wasteof Plugins as a userscript and upload it to like greasy fork or something. Right now I am working on a way to easily create dialogs (like the create a new post dialog) and an account switching plugin. Account switching will almost certainly not be in the first release, but hey it's coming.

Also, I'm working on desktop notifications for whenever you get.. a notification. But that's both closer and way farther away than account switching, and is likely to not be present in the first release either, at least not in its final form.