This issue is caused by a recent Firefox update version 41.0.1, versions of Firefox prior to this update have not displayed the same behavior.
While we work to find a permanent resolution to this error, those that wish to continue to use Firefox can do so by installed version 40.
Note: the following steps will require you to uninstall the current Firefox browser, and may require restarting your computer, so it's recommended you print a copy of these steps.
1- Download the version 40 installer package from the Resource Library
2- Browse to your list of installed Programs, Control Panel>Programs and Features
3- Highlight Mozilla Firefox 41.0.1 and select Uninstall
4- Follow the on screen prompts to complete the uninstall
5- Once the uninstall completes, launch the Firefox Setup 40.0.exe from step 1
6- Follow the prompts on screen to complete the install
Once the install completes, you must turn off Automatic Updates
7- Open Firefox, and click the 3 horizontal line button to open the Menu
8- Select Options>Advanced
9- Under Firefox Updates, select either:
Never Check for Updates