[techwolf]

Much better, thanks! It's scripts like this that make me miss the old XUL addon interface; sure it was difficult to maintain, but it granted a level of control over the browser that wasn't (and now, sadly, isn't) possible anywhere else.

I was able to piece together most of my compact dark interface theme [1] with userChrome.css by sacrificing the all-tabs menu for its JS binding, but the all-tabs helper addon is a shadow of what it once was, and the Private Tabs addon is dead with no hope of revival due to the lack of a WebExtension API [2]. I can't even switch browsers to get the functionality back since the others are even less configurable.

[1]: https://github.com/techwolfy/rainfox-theme

[2]: https://bugzilla.mozilla.org/show_bug.cgi?id=1358058