Yeah I thought memory leak at first but I monitored the ram and it doesn't seem to be going nuts. I didn't have anything but the bitcointalk tabs opened, no charts. I even closed my normal Firefox window which I usually have bitcoinwisdom opened.
I have fixed it (for now) by sliding all the way up the security level fadder and everything is sharp again. When I did that I also restarted my computer so im not sure what did it. If anyone has this problem you can try that.
As far as logging off automatically I didn't click the "stay logged in" checkbox and I think in the past Tor would you log you off even you checked that.