WARNING: This add-on, it seems, has ruined my browsing. I decided I didn't want it so removed it, now every single site I visit has a black background, white text, and unreadable blue links. A lot of page elements are now invisible. Nothing I do overrides this. I have tried reinstalling the addon, but the toggle button is greyed out no matter what I do, and clicking the toggle option in the view menu does nothing. Restoring to default theme does not solve the problem either. Even in safe mode the problem is still there. Even after uninstalling and reinstalling Firefox, it is STILL stuck like this. I may actually have to change browsers because this extension has ruined everything. I even had to write this review from a different browser because I couldn't give a rating in Firefox (element was invisible and could not be set). I would seriously recommend nobody downloads this, because if you decide you don't like it, it won't let you change back. To whoever made this: thanks for nothing, from now on fix your buggy software before releasing it.