Are you still using Firefox 3.0.x? It is best to go and thinking of upgrading. Mozilla has announced that version 3.0.19 is the latest update of security and stability that is published for the 3.0.x branch, and thereafter only offer support for versions 3.6 and 3.5.

In fact, it was expected that the life cycle of Firefox 3.0.x ended earlier this year during the month of January, but the delay of version 3.6 that Mozilla triggered a few months extended support for that branch.

The latest version 3.0.19 will be released later this month. If you do not want to stay unsupported necessarily have to upgrade to version 3.5 or 3.6.