Created attachment 8656633 [details] Screenshot from 2015-09-03 19-11-17.png User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:40.0) Gecko/20100101 Firefox/40.0 Build ID: 20150826023504 Steps to reproduce: OS: Fedora 22 Shell: GNOME 3.16.3 Firefox versions: 40 1. Go to about:config in firefox and set value of layout.css.devPixelsPerPx to 2 2. Enable gnome hidpi scaling, using the command: gsettings set org.gnome.desktop.interface scaling-factor 2 2. Go to a site with flash based videos, such as www.ndtv.com/video/live/channel/ndtv24x7 3. Play a video in default screen size (not in full screen mode) Actual results: 1. video keeps blinking and is not continuous 2. clicking on the pause, play button causes rendering artifacts to show up Expected results: 1. properly rendered video
User Agent-Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0 Nightly 45.0a1 Build ID 20151201030226 and Firefox 42.0 I am unable to reproduce. Are you still able to reproduce the issue using the latest Firefox/Nightly version ?
Sounds like this is a plugin rendering issue, rather than a problem with the video element.
Closing this as incomplete due to inactivity and lack of response from the reporter. Please feel free to reopen the bug if the issue still reproduces on a current build. Thanks