Firefox uses HTML5 on Windows 7 but Flash on Windows 8.1/10?
I use Firefox on Windows 7 and Windows 8.1 (just upgraded to Windows 10 on that machine). Firefox uses HTML5 for all Youtube videos on Windows 7, but Flash on the Windows 10 machine.
How do I get HTML5 to default on the Windows 10 machine? Why are these different? Both are running the same version of Firefox.
選ばれた解決策
could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste that here into a reply on the forum as well? this might give us a clue what is going on...
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Is the problem specific to MP4 media, or does it affect all HTML5 video, even WebM or OGG media?
To test WebM, you can scroll down in this page to the section titled "WebM Videos within the HTML5 <Video> Tag" where you should see a player: http://www.webmfiles.org/demo-files/
If it is MPEG specific, do you use an N or KN build of Windows? If so, you probably need the Media Feature Pack to get the components Firefox uses to decode MPEG media: https://www.microsoft.com/en-us/download/details.aspx?id=48231
It seems specific to Youtube. I've run tests for MP4, WebM (including the link you posted) and OGG elsewhere and all work fine. Youtube just seems insistent on using Flash on my W10/more recent machine.
My Windows is straight up 10 Home, not K or KN.
What do you see on the YouTube HTML5 page?
Can you attach a screenshot of this page?
- http://en.wikipedia.org/wiki/Screenshot
- https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem
- Use a compressed image type like PNG or JPG to save the screenshot
- Make sure that you do not exceed the maximum size of 1 MB
Here we go...
No ideas?
選ばれた解決策
could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste that here into a reply on the forum as well? this might give us a clue what is going on...
Application Basics
Name: Firefox Version: 39.0.3 Build ID: 20150806001005 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0 Multiprocess Windows: 0/1 (default: false)
Crash Reports for the Last 3 Days
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Name: Video DownloadHelper Version: 5.3.1.1-signed Enabled: true ID: {b9db16a4-6edc-47ec-a1f4-b86292ed211d}
Name: YouTube™ Flash® Player Version: 1.3.1-signed Enabled: true ID: jid1-HAV2inXAnQPIeA@jetpack
Name: Avast Online Security Version: 10.2.0.187 Enabled: false ID: wrc@avast.com
Graphics
Adapter Description: NVIDIA GeForce GTX 760 Adapter Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um,nvwgf2um Adapter RAM: 2048 Asynchronous Pan/Zoom: none Device ID: 0x1187 Direct2D Enabled: Blocked for your graphics driver version. DirectWrite Enabled: false (10.0.10240.16390) Driver Date: 7-22-2015 Driver Version: 10.18.13.5362 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Subsys ID: 28471462 Vendor ID: 0x10de WebGL Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 760 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote: true AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0
Important Modified Preferences
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Important Locked Preferences
JavaScript
Incremental GC: true
Accessibility
Activated: false Prevent Accessibility: 0
Library Versions
NSPR Expected minimum version: 4.10.8 Version in use: 4.10.8
NSS Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC
NSSSMIME Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC
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NSSUTIL Expected minimum version: 3.19.2 Version in use: 3.19.2
Experimental Features
Do you use any video-downloading add-ons? Some might force Flash on YouTube.
Whoops, our posts crossed. What if you disable the "YouTube™ Flash® Player" extension?
Oh dear, having done that I've just noticed I have this Youtube Flash Player add-on. I've disabled it and HTML5 is working. I'm such an idiot. I don't even remember installing that! Thanks for your help all.