Netflix announced today that their HTML5 video player now supports Firefox on Windows Vista and later using Adobe’s new Primetime CDM (Content Decryption Module). This means Netflix fans can watch their favorite shows on Firefox without installing NPAPI plugins.
As we announced earlier this year, Mozilla has been working with Adobe and Netflix to enable HTML5 video playback. This is an important step on Mozilla’s roadmap to deprecate NPAPI plugins. Adobe’s Primetime CDM runs in Mozilla’s open-source CDM sandbox, providing better user security compared to NPAPI plugins.
![Html5 Html5](http://wp.xin.at/wp-content/uploads/2017/02/firefox-html5-h264-xp_pluginlist.png)
In 2016, Mozilla and Adobe plan to bring the Primetime CDM to Firefox on other operating systems.
Netflix Blog Post: HTML5 Video is now supported in Firefox
Adobe Blog Post: Update on HTML5 Premium Video Playback with Adobe Encrypted Media Extensions Support in Firefox
Adobe Blog Post: Update on HTML5 Premium Video Playback with Adobe Encrypted Media Extensions Support in Firefox
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While Mozilla Firefox has good support for HTML5 standards, you might have noticed that it does not support all features required to play videos on YouTube without having Adobe Flash Player installed. It supports the required HTMLVideoElement, but some videos do not play anyway. Those videos require the Media Source Extensions feature which is disabled by default in Firefox. By default, this option is off in Firefox, so the browser is not able to play some HTML5 video streams. If you prefer HTML5 videos over the Adobe Flash Player, you might want to enable Media Source Extensions to get advanced support of HTML5 videos in Firefox.
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- Open the Firefox browser and type the following in the address bar:Note: A warning page may appear that says 'This might void your warranty!'. Click 'I'll be careful, I promise!' to continue to the about:config page.
- Type the word: 'mediasource' (without quotes) in the filter text box.
- You will see the media.mediasource.enabled parameter which is set to false. Double click it to change its value to true.
- Restart Firefox.
Now open some HTML5 video from YouTube that did not play initially. Now it should play without any issues.
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