Complaints coming in about address bar!

I have been getting complaints on my reviews about the change in the address bar since the update. I noticed it, but it doesn’t bother me because it goes away as soon as your cursor isn’t there. BUT it does bother quite a few people. They are also saying they noticed it on my themes and not others. So, can someone tell me why and how do I fix this or can I fix it?

Well, now I know why it happens, but I would like to know why it was changed in the FF update. I can’t see any reason for changing it. If a theme designer wants the search bar transparent…it should be left transparent and not changed to black when the cursor is in the search bar.