Zkuq on 17 November 2017
| SpokenTruth said: It doesn't play well with my theme (neither do just about any of them now) and my tab extension that allowed me to control tab font colors is gone. I may have to manually change them unless they get an update to work with the new version. |
There's a very restricted set of things extensions can do with the UI, and what you want isn't possible. Your only choice is to edit userChrome.css or get a theme that modifies the fonts (if that's possible either, which I kind of doubt), or wait for Mozilla to hopefully implement better customizability for the UI some time in the future (which doesn't seem like something that's going to happen in the near future, if ever).
