Everything in Mint is fine except when browsing firefox keeps just dissapearing as does Thunderbird (but not nearly as much).
I have used Firefox on and off on PC Win XP, Mac and now Mint and the same problem has happened on each system over the years. For example last night i was trawling through ebay and went to my page, it started to load then just dissapeared. I had to restore session and carry on without probs untill it did it again a few minutes later. It seems to happen infrequently.