I know this has been posted several times already, but I think a remember is necessary.
After updating Firefox you will get a missing plugin error. It happened for me when updated Firefox from 14.0.1 to 15.0 with Windows XP Service Pack 3. I fixed this by simply disabling IE Tab, restarted Firefox, enabled it again and restarted again. We are waiting for a real fix. I think this happens only for the revised original IE Tab (https://addons.mozilla.org/en-US/firefox/addon/ie-tab/
). I used IE Tab V2 (https://addons.mozilla.org/en-US/firefo ... b-2-ff-36/
) for a while and it behaved with clashes like a gamble game. I estimated a crash rate of about 17% of total sessions initiated with a peak rate of about 45% with Firefox 9.x. It's crash rate, now has decreased to around 5%, however it would definitely crash if IE would hang in the same circumstances.
I thought about trying IE Tab + or IE Tab Plus, but right then rumors about malware infection came up so I quit thinking.
IE Tab revised original is fastest and least crashy (0% crash rate so far), but is not perfect until that annoying missing plug-in error after Firefox update is fixed.