Problem with Firefox/itunes and MacBook Pro

[dmetz283]

Almost every time I use FireFox 3.6.3 on my mac its okay for a while but them It becomes unresponsive and I get the mac busy icon. I usually have few windows and tabs open. I use these add-ons:

1. LastPass
2. Read it later
3. Session Manager
4. Flash Block
5. BarTab
6. Tab Mix Plus

I have a 13" mid-2009 MacBook Pro with 2 GB of RAM. Sometimes it is so bad I have to force quit Firefox.

Also another problem is with iTunes freezing.

 

[miles01110]

Try disabling each extension one at a time to see if doing so solves the problem.

 

[dmetz283]

I'm not sure if the add-ons are causing the problems because I have disabled them all before and sometimes still get the same result. Also could the problem be related to my mac's ram?