User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 Build ID: 20160303134406 Steps to reproduce: Change the window size of Firefox via the "restore / maximize" button. Actual results: If you have any Youtube Videos opened in a tab, one randomly of them will start play. Expected results: Nothing, of course. I even can't explain why changing the window size would trigger a video to playback.
As a sidenote: It does not happen all time. Maybe only 1 in 5 times.
Is it reproducible with a fresh profile?
Component: Untriaged → Audio/Video: Playback
Product: Firefox → Core
Jim - this smells a little bit like a widget bug. Thoughts?
(In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #3) > Jim - this smells a little bit like a widget bug. Thoughts? Maybe, but doesn't seem plausible. (An errant input event?) I'd guess layout or dom over widget since resizing triggers reflow.
Moving to DOM > Core/Events.
Component: Audio/Video: Playback → DOM: Events
I tried repeatedly resizing a window (something like 6 times) with a paused youtube tab open and couldn't reproduce.
My guess is that it is racy. Tell us more about the machine you're hitting the issue on? What CPU does it have? What version of Windows? Can you also paste in the graphics section of about:support
(In reply to Loic from comment #2) > Is it reproducible with a fresh profile? I didn't have the time to test it on a fresh profile. That would be very time consuming because I don't know a single way to clearly reproduce – it just happens from time to time. Did some testing in the last 20 minutes, but not once the bug occured. :/ (In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #7) > Tell us more about the machine I'm working on a MSI Notebook from 2015, with a Intel i7-5700HQ, running Windows 10 build 10586.13. From about:support : Grafik ------ Asynchrones Wischen und Zoomen: nichts ClearType-Parameter: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50 DirectWrite aktiviert: false (10.0.10586.0) Gerätekennung: 0x1612 Gerätekennung (GPU #2): 0x139b GPU #2 aktiv: false GPU-beschleunigte Fenster: 0/1 Basic (OMTC) H264-Hardware-Dekodierung unterstützt: No; Hardware video decoding disabled or blacklisted Herstellerkennung: 0x8086 Herstellerkennung (GPU #2): 0x10de Karten-Beschreibung: Intel(R) HD Graphics 5600 Karten-Beschreibung (GPU #2): NVIDIA GeForce GTX 960M Karten-RAM: Unknown Karten-RAM (GPU #2): 2048 Karten-Treiber: igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32 Karten-Treiber (GPU #2): nvd3dumx,nvwgf2umx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um,nvwgf2um Subsys-ID: 11031462 Subsys-ID (GPU #2): 11031462 Treiber-Datum: 11-18-2015 Treiber-Datum (GPU #2): 3-7-2016 Treiber-Version: 18.104.22.16831 Treiber-Version (GPU #2): 10.18.13.6451 WebGL-Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 5600 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote: true AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0
Quadronom - are you resizing with the mouse, touchpad or touch screen? If it is a touchpad, are you using a separate button to drag or are you relying on touch drag? I'm wondering whether we're delivering touch events to the window. Brian - you know something about events? Any ideas?
(In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #9) > Brian - you know something about events? Any ideas? No. Olli or Masayuki are more like to be of help.
(In reply to Anthony Jones (:kentuckyfriedtakahe, :k17e) from comment #9) > Quadronom - are you resizing with the mouse, touchpad or touch screen? Actually I never resize my firefox at all, it's always maximized (But if I would, I'll use my mouse). I experienced the bug when I accidentelly missed the minimize button and hit restore. I might want to add, that this could be a weird youtube bug as well – I didn't have the problem for a few days now…
Guys, it got even weirder. In one tab I had Amazon Prime Video (Silverlight!) open, then I plugged an external monitor into my notebook: and tada, suddenly the playback of my Dexter episode started!
Status: UNCONFIRMED → RESOLVED
Last Resolved: 4 days ago
Resolution: --- → INACTIVE
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