I need some info on how to silently install the .xpi files for Firefox extensions or on creating a customer repacked setup file that will automatically include the required extensions. Any help would be great. And I did do a search but found very little in the way of doing this and a lot of just repacked setup files done by other people.

so much threads about firefox/mozilla/thunderbird... silly me thought people who knew what they were doing used firefox guess they use opera

After you search, you need to then read the thread. My first search ended up turning up this thread, and scroll up, here is your answer.

link