This extension simply dosent work and can NOT work at all, and will NEVER work... due to Content Security Policy

Used to work great, but now it stopped saving changes to the JS file. It still works with the JS that is in the box right now, but no longer saves any changes.

EDIT: Okay, I tried around some more, it seems to fail to save changes as soon as the document reaches a certain size, which seems to be at around 230 lines for me depending on line length. Would be nice if this could get a fix!

Works like a charm. It successfully applies the changes to every site you visit. I really recommend it to everyone. Cheers!

Great extension, really convenient for making changes to websites and saving handy utility functions I can use across the web.

Only 4 stars rather than 5 however because all the code is injected for every website. If it were possible to inject scripts on a per-domain/path/exact URL basis in the same way as Stylus does for CSS I would give it 5 stars without hesitation.