I want to change the way Firefox (or Iceweasel in my case) handles highlighting of tabs. This is how it is done as of now (the bottom tab is highlighted, the top is colored).
I basically want to change the shape of the highlighting (which looks like a hill to me, suggesting the tab is located below which is not true for me). I guess I can do this within my userChrome.css
and I searched for quite a while now, but haven’t found any clue on the web on how to do that.
Two questions:
Is there some default style sheet where I can lookup how tab highlighting is handled by default, so that I can easily put together the code I need by reading in it?¹
How can I modify the tab highlighting thing?
Remark: The first question is of course the main question, as it is more general and therefore more useful to others. If the second question is answered satisfactorily, but the first one defies to be answered satisfactorily, I will edit the title to fit the answer better.
¹: I expected something like this in /etc/mozilla/iceweasel/defaults/chrome.css
, you know what I mean? Some default style sheet firefox would be using by default.