For some reason, in Firefox, the Back, Forward and Home buttons are now dim. The arrows and house in these buttons used to be black when they were available, now they look like this: You can see that the back arrow is slightly darker than the forward arrow, but why is it not black like it used to be? I used app cleaner to get rid of Firefox and then re-installed it, but it still looks like this. It still works fine, but it is very frustrating that I haven't actually done anything to change it. I have a MacBok Pro with the same version of Firefox and Lion installed and the back, forward and home buttons are normal on it. Here is a screen shot from my MBP: What has happened to Fierefox on my iMac?