Videos at PBS do not load
http://video.pbs.org/video/2365184276/
For this and all videos I've tried at PBS.org, the video will not load, instead providing an error message "Error loading plugin: plugin file not found"
Disabling HTTPS Everywhere results in desired playback of video. I could not find a PBS site setting in the extension
HTTP-E 3.4.5 Firefox 27.0.1 Mac