Originally Posted by jana70
can't op-en firefox. get xpcom cannot load msg.
No ideas, because you don't provide any details. You don't say what version/distro of Linux, what version of Firefox, if this was ever working or not, any updates you've done recently, etc.
There are things you can try for this error that you can find on Google...again, since you've provided no details, there's not much we can help point you to, or solutions to offer.