Okay - I searched a little and did not find the exact location to post this - I am wishy washy and use both Safari and Firefox - ok that is out of the way. OS is 10.5.8 FF 7.0.1 Safari 5.0.6 (5533.22.3) I can not view pdf's in Firefox - no issues in Safari - so i know that I can use that but I was looking to see if there are others with this issue. Some 3rd party apps work in 10.6 some FF apps work before 10.5.8 thanks in advance - just throwing it out there - i can live with it as it is but would like it better. Why FF? I don't have an answer but I do use both Safari and FF and find different features in each that are appealing.