I closed my Fx 3.6.xx and when I opened it, I saw some progressbox about Fx being updated, next was wizard with questions about extensions and in the end I got Fx 12! No one asked me about this switch. I was purposedly keeping that version.
Am I the only one cursing Firefox engineers right now?
Seriously, 3.6 came out two and a half years ago. What possible reason could you have to keep it? Do you want to get malware?
Edit: downvotes? It's a legitimate question.