Doesn't work at all

garbabge

Didn't do anything, even after many refreshes and toggles of both options on the annoyingly minimalist (read: lacking in explanations) options menu.

Does not work at all. Looks horrible.

does not work anymore

does absolutely nothing

It literally just makes the document border black. The actual document, and all menus and such are still their normal color. Actually makes it much worse.

Does absolutely NOTHING in Firefox 94.0.2 (64-bit)

It removes the ability to see spelling and grammar mistakes underlined on words

It worked lovely for a few months and now it doesn't do anything