Firefox regularly prevents me from adding attachments to my mail in Gmail. I know the problem is with Firefox because i will have to switch to Chrome and it will work fine. It also sometimes - but not always - fixes it to close Firefox and reopen it, but then it just happens again and again, and I don't like to have to do that - I will usually be on deadline with multiple windows I need to have open. I have a MacBook Air. This has been going on for a while - I've tried reinstalling and everything. It's become so frustrating I'm close to having to stop using Firefox altogether, which I would prefer not to do. The must be some bug that can be fixed. Please Help!