Why can't I change my firefox tab color?

Question

I used to be able to change the color of the active tab in firefox by putting code into my userChrome.css file. I have a new computer now and for some reason I can't seem to change the tab color. I have tried every code I can find on the net (most are the same) but they are not working. I am using version 1.5.0.8 I have restarted firefox each time I have tried the code. I have also tried restarting my computer, but with no luck. What am I doing wrong? Why is this not working?

Answer 1

Why are you using 1.5 still? try Firefox 2