Firefox Hangs very frequently

Dear Friends

My Firefox 14 and 15 both hangs very frequently I have tried every thing by updating plugins reinstalling all the plugins but i don't know whats the problem is the windows 7 report is as under

A problem caused this program to stop interacting with Windows.

Problem signature:
Problem Event Name: AppHangB1
Application Name: firefox.exe
Application Version: 15.0.0.4619
Application Timestamp: 50382fcd
Hang Signature: 3ae9
Hang Type: 1
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 16393
Additional Hang Signature 1: 3ae90cae0016742c918cf441d5ecb26c
Additional Hang Signature 2: deee
Additional Hang Signature 3: deeeea74494a8b03ec40a36eaaa426e3
Additional Hang Signature 4: b9ce
Additional Hang Signature 5: b9cecf68d3e17233fb16aac50e04f5b0
Additional Hang Signature 6: 3ee2
Additional Hang Signature 7: 3ee2564d1b0e4d199bb93deccc5d5fdd

Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

Please help me out from this situation as I using portable apps for the last 5-6 years may be more

Thanks in advance

Satbir Singh