Title: Plugin doesn't work in Firefox 21.0 for Mac
Last modified: August 21, 2016

---

# Plugin doesn't work in Firefox 21.0 for Mac

 *  [islamdesign](https://wordpress.org/support/users/islamdesign/)
 * (@islamdesign)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/plugin-doesnt-work-in-firefox-210-for-mac/)
 * Hello! I try to use your plugin version 2.10.3. It works in Chrome and Safari
   for Mac, but not work in Firefox – when i push the play button the player disappears.
   Please check it. Thank you! Sorry my English.
 * [http://wordpress.org/extend/plugins/media-element-html5-video-and-audio-player/](http://wordpress.org/extend/plugins/media-element-html5-video-and-audio-player/)

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [Duck Whistle](https://wordpress.org/support/users/duck-whistle/)
 * (@duck-whistle)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/plugin-doesnt-work-in-firefox-210-for-mac/#post-3809668)
 * I have the same problem, I would really appreciate anyone’s help if they have
   resolved this already, thank you.
 * I’m just using an MP3 file, hosted on the same domain as the website.
 *  [Duck Whistle](https://wordpress.org/support/users/duck-whistle/)
 * (@duck-whistle)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/plugin-doesnt-work-in-firefox-210-for-mac/#post-3809669)
 * I think it’s trying to go from HTML5 to Flash and failing.
 * I found that converting the MP3 to OGG and using both files stopped the problem
   from happening. [audio mp3=... ogg=...]
 * [http://www.mediahuman.com/audio-converter/](http://www.mediahuman.com/audio-converter/)
   Free audio file conversion for Intel-based Macs.
 *  [Maverynthia](https://wordpress.org/support/users/maverynthia/)
 * (@maverynthia)
 * [12 years, 10 months ago](https://wordpress.org/support/topic/plugin-doesnt-work-in-firefox-210-for-mac/#post-3809677)
 * Having the exact same problem. Converting files is not an option.
 *  [webteam](https://wordpress.org/support/users/webteam_tebbens/)
 * (@webteam_tebbens)
 * [12 years, 4 months ago](https://wordpress.org/support/topic/plugin-doesnt-work-in-firefox-210-for-mac/#post-3809707)
 * I have same problem with Firefox 26 and the latest version of MediaElement.js
   and wordpress 3.8. All my mp4/h264 video’s play well in Safari on Mac, but do
   not play at all in Firefox 26.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Plugin doesn't work in Firefox 21.0 for Mac’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/media-element-html5-video-and-audio-
   player.svg)
 * [MediaElement.js - HTML5 Video & Audio Player](https://wordpress.org/plugins/media-element-html5-video-and-audio-player/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/media-element-html5-video-and-audio-player/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/media-element-html5-video-and-audio-player/)
 * [Active Topics](https://wordpress.org/support/plugin/media-element-html5-video-and-audio-player/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/media-element-html5-video-and-audio-player/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/media-element-html5-video-and-audio-player/reviews/)

 * 4 replies
 * 4 participants
 * Last reply from: [webteam](https://wordpress.org/support/users/webteam_tebbens/)
 * Last activity: [12 years, 4 months ago](https://wordpress.org/support/topic/plugin-doesnt-work-in-firefox-210-for-mac/#post-3809707)
 * Status: not resolved