User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20150513174244 Steps to reproduce: View http://www.elstel.org/html5video/Html5VideoScripting.html.de with three different browsers. Actual results: While the rewind function worked well with Safari and Qupzilla it does not work with Firefox, yet. Expected results: It would be very nice if Firefox supported scrolling back HTML5 videos via setting a negative playback speed by Javascript.

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:41.0) Gecko/20100101 Firefox/41.0 Build ID: 20150521030204 Browser Console says NS_ERROR_NOT_IMPLEMENTED: Html5VideoScripting.html.de:163:0 which points to video.playbackRate = rate;

not yet implemented for Firefox 40.0.3, MacOS Yosemite 10.10.5.

Someone knows when it will be fixed? we are waiting this working. Thanks in advance

This is still failing to me, please in which version will be fixed? is it in your plans to fix in the upcoming versions?, I'm blocked :'(

As far as I can see, I don't find many websites using negative playback speed. However, I could be wrong. Please share them with me if you find some or there are other use cases you need to use negative playback speed. Thanks.

Make it as P5 before we can better know the values user can get.