Mac running Mavericks Crashes Firefox Daily. EXC_BAD_ACCESS / KERN_PROTECTION_FAILURE Please help.

Question

Hi,
I have a Mac running Mavericks and Firefox keeps crashing most daily for the past three months and I get a "Firefox has crashed submit report" popup.
It is usually if I am playing a youtube video or a movie (more then one) at a time. Or if one video is loading and I try to play or load another. I notice if I "que" or pre-load a long video (more then 15 minutes), then try to play a new one it will crash.
I have tried the following solutions none of which have worked:
A) Uninstalling and reinstalling firefox
B) Reset Firefox (Help, troubleshooting information, reset firefox)
C) Turn off hardware acceleration (Firefox, preferences, un-check hardware acceleration)
D) Turn off "enable hardware acceleration in "youtube" (it now asks me each time if I would allow it to play)
E) Plugin Check and Updates are all up to date (http://www.mozilla.org/en-US/plugincheck/) I only have:
SharePoint Browser Plug-in (research)
Default Browser Helper (research)
These plugins are up to date: (as of March 7th 2014)
Shockwave for Director 12.0.6 (Up to Date)
Shockwave Flash 12.0.0.70 (Up to Date)
QuickTime Plug-in 7.7.3 (Up to Date)
Sometimes I get this as the "signature": libsystem_platform.dylib@0x4280
Again I have tried the above solutions but they have not worked. Any help or advice will be appreciated.
Thank you
Shawn

Answer 1

Hi Guigs2, Thank You for the reply. Was getting worried no one was going to help me. I am not sure how to attach the crash report. I have copied and pasted it here:
Signature libsystem_platform.dylib@0x4280 More Reports Search
UUID 8ad72df1-8891-46e4-849f-d3e2a2140307
Date Processed 2014-03-07 22:54:36.428514
Uptime 64662
Last Crash 107531 seconds before submission
Install Age 1835073 since version was first installed.
Install Time 2014-02-14 17:09:51
Product Firefox
Version 27.0.1
Build ID 20140212131424
Release Channel release
OS Mac OS X
OS Version 10.9.2 13C64
Build Architecture x86
Build Architecture Info family 6 model 42 stepping 7 | 4
Crash Reason EXC_BAD_ACCESS / KERN_PROTECTION_FAILURE
Crash Address 0x0
User Comments
App Notes
AdapterVendorID: 0x1002, AdapterDeviceID: 0x6740WebGL? GL Context? GL Context+ WebGL+
Processor Notes sp-processor05_phx1_mozilla_com.24886:2012; HybridCrashProcessor
EMCheckCompatibility
True
Winsock LSP
Adapter Vendor ID
0x1002
Adapter Device ID
0x6740