I don't know if this is a virus or what. I have searched and searched and cannot find anything about it. I noticed it on one of our computers yesterday. I was able to turn the add-on to "Never Activate" and turn the update "off". But it does not give me the option to delete it. I looked in the place on the computer where you can delete programs (sorry I don't know the technical name for it) and did not see it there.
The name that is listed in the Firefox add-ons is: OpenH264 Video Codec provided by Cisco Systems, Inc. 1.1