hi, please start by updating firefox and all plugins to their latest version: Update Firefox to the latest release https://www.mozilla.org/plugincheck/

Security Issue: Update your Flash Player Version 18.0.0.232
https://www.adobe.com/products/flashplayer/distribution3.html Note: Windows users must download the “Internet Explorer” and “Plugin-based browsers” installers.

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

Note that this is a crash with the Shockwave Flash plugin.

• Firefox 3.6.15 Crash Report [@ hang | RtlpWaitForCriticalSection | RtlEnterCriticalSection | F_1706698279__________________________________ ]

Your Firefox version is detected as Firefox 3.6.15 in that crash report.

Were (are) you really still using such an old Firefox version since you posted with Firefox 33?