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15.04 without restricted addonsĪs you can see in this screenshot the OpenH264 plugin is enabled, there is no Flash plugin, a few GStreamer packages in different versions are preinstalled but the video does not play! Instead the site immediately tells us that the video can't be played. 14.04.2 with restricted addonsĪs you can see in this screenshot only the OpenH264 plugin is enabled in Firefox, all the necessary GStreamer packages in different versions are preinstalled and the video plays as expected. Whenever I made some changes in the test, like installing a package or enabling/disabling something in Firefox I closed and launched Firefox again. I chose Vimeo, because they say they default to HTML5 and they don't seem to support WebM, which I consider not to be a good thing. Since YouTube also offers their open sourced WebM formats and I wanted to avoid going into to much detail about test methods I needed to use another HTML5 capable site to test proprietary H.264 playback support.
#Html5 plugin for firefox install
Not directly related but if you prefer to automatically delete cookies when Firefox gets closed and can't find the right cookie to keep for persistent HTML5 playback then I suggest to install YouTube ALL HTML5.
#Html5 plugin for firefox software
While this is indeed a very convenient solution it should also raise privacy and security concerns when software automatically downloads binaries from sites affiliated with Cisco Systems or other companies, no matter how transparent the process and license agreement is. That sounds great, doesn't it? Wait… that was a pun. To enable this plugin Firefox will now automatically download a binary from the OpenH264 website the first time you start the program. Mozilla added support for OpenH264 as a plugin in Firefox 33.