Created attachment 8661147 [details] screenshot - [e10s] Flash content doesn't repaint correctly when zooming with Ctrl+MouseWheel.png STR: (Win7_64, Nightly 43, 32bit, ID 20150913030204, new profile, safe mode) There should be better STR, but it doesn't happen with some SWFs. So I expect somebody to find another SWF exposing this behavior. 0. Enable e10s, restart browser. 1. Open about:addons -> Plugins, set Shockwave Flash to "Always activate" 2. Set media.fragmented-mp4.enabled -> false, media.webm.enabled -> false If that won't help, then open the following page and disable all preferences to force youtube Flash player > about:config?filter=/media.(ogg|opus|windows-media-foundation|wave|webm|mediasource|mediasource.mp4|peerconnection.video|eme|fragmented-mp4).enabled/ 3. Open https://www.youtube.com/watch?v=3IT2Cc_5WxE 4. Press Ctrl (don't release Ctrl) 5. Scroll mouse wheel Up and Down Result: [see screenshot] Flash content doesn't repaint correctly when zooming with Ctrl+MouseWheel Expectations: Flash should repaint correctly
Hm, I see similar thing in non-e10s mode, but not so noticeable. It's clearly visible in e10s.