Happening again on non-Youtube video sites. Oddly, it stops if I run Firefox in safe-mode, but if I manually disable all of my plugins the issue remains. Regardless of what I turn off it still has the problem. However, even though Safe Mode fixes the issue on non-youtube sites, the problem persists in embedded youtube video even in Safe Mode, which is strange.

It's not consistent though. Some sites have issues and others do not. I have no idea why. It's also only happening on my PC. My laptop isn't having this issue and it's running the same versions of flash, and Firefox.

It's happening on too many different sites for it to be the site itself causing the problem. However, when it does occur, it's consistent, reloading or restarting doesn't make it go away on that particular site.

Also, various other Firefox builds have the problem, including Waterfox and the Nightly build.

Not sure what the deal is exactly. Something is glitching out, but I have no idea exactly what it is. I'm not certain it's Flash either, as Youtube is running HTML5. I'm not certain if some of these other problem sites are also HTML5.

I think that might be where the problem lies, there might be an issue with Firefox and HTML5.

Edit: Confirmed, this issue seems exclusive to HTML5 players. Something is preventing them from playing back properly and they don't always have an option in the left click menu to disable hardware acceleration.

Any ideas about what to do?

hello, could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on...

Here you go.

It's worth noting that I've had every one of the plugins disabled with the same results. Using safe mode fixes the issue for the video source, but it still persists with embedded video.

I've also tried refreshing Firefox and the problem still persisted even with the various plugins uninstalled. I've since put them back.

Application Basics

Name: Firefox Version: 35.0.1 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0 Multiprocess Windows: 0/1

Crash Reports for the Last 3 Days

All Crash Reports (including 1 pending crash in the given time range)

Extensions

Name: Adblock Plus Version: 2.6.7 Enabled: true ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

Name: Ant Video Downloader Version: 2.4.7.27 Enabled: true ID: [email protected]

Name: Hola Better Internet Version: 1.6.222 Enabled: true ID: jid1-4P0kohSJxU1qGg@jetpack

Name: MEGA Version: 2.0.214 Enabled: true ID: [email protected]

Name: YouTube High Definition Version: 35.3 Enabled: true ID: {7b1bf0b6-a1b9-42b0-b75d-252036438bdc}

Name: Avast Online Security Version: 10.0.2502.149 Enabled: false ID: [email protected]

Graphics

Adapter Description: AMD Radeon HD 7900 Series Adapter Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 4095 ClearType Parameters: D [ Gamma: 2200 Pixel Structure: B ClearType Level: 0 Enhanced Contrast: 400 ] D [ Gamma: 2200 Pixel Structure: B ClearType Level: 0 Enhanced Contrast: 400 ] Device ID: 0x6798 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.16571) Driver Date: 11-20-2014 Driver Version: 14.501.1003.0 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Subsys ID: 30001002 Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 7900 Series Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: true AzureCanvasBackend: direct2d AzureContentBackend: direct2d AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.smart_size.first_run: false browser.cache.disk.smart_size.use_old_max: false browser.cache.frecency_experiment: 2 browser.places.smartBookmarksVersion: 7 browser.sessionstore.upgradeBackup.latestBuildID: 20150122214805 browser.startup.homepage_override.buildID: 20150122214805 browser.startup.homepage_override.mstone: 35.0.1 dom.mozApps.used: true extensions.lastAppVersion: 35.0.1 gfx.direct3d.last_used_feature_level_idx: 0 media.gmp-gmpopenh264.lastUpdate: 1422366737 media.gmp-gmpopenh264.version: 1.1 media.gmp-manager.lastCheck: 1422627769 network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1422712367 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true plugin.state.npamazonmp3downloaderplugin: 1 plugin.state.npctrl: 2 plugin.state.npesnlaunch: 1 plugin.state.npesnsonar: 2 plugin.state.npvlc: 2 privacy.sanitize.migrateFx3Prefs: true privacy.sanitize.timeSpan: 0 storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1422371544

Important Locked Preferences

JavaScript

Incremental GC: true

Accessibility

Activated: true Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.7 Version in use: 4.10.7

NSS Expected minimum version: 3.17.2 Basic ECC Version in use: 3.17.2 Basic ECC

NSSSMIME Expected minimum version: 3.17.2 Basic ECC Version in use: 3.17.2 Basic ECC

NSSSSL Expected minimum version: 3.17.2 Basic ECC Version in use: 3.17.2 Basic ECC

NSSUTIL Expected minimum version: 3.17.2 Version in use: 3.17.2

Experimental Features

the issue sure sounds like being related to hardware acceleration - since you already have the latest graphics drivers available installed, maybe the only way around that is to generally disable hardware acceleration for the moment in the firefox menu ≡ > options > advanced > general (that setting will take a restart of the browser to take effect).

That did it. Thanks a lot!

All videos work now. Apparently Firefox and hardware acceleration don't like HTML5 on my system. No idea why, but the issue is gone once I disable it. Didn't even know that setting was there, I'm used to doing it by left clicking the video player and using the menu there.

To me, the only think that seems to solve "palliatively" is to disable the hardware acceleration, what indicates some video driver issue.

If you use ATI video card, I suggest you to install the lastest BETA version of AMD drivers. This solved completely this issue to me.

It's important to make clear that a BETA version is a test version, what may bring more problems than solutions, although that it doesn't occur with frequency. I, for one, always install the lastest version, being BETA or not.

AMD drivers can be downloaded here: http://support.amd.com/en-us/kb-articles/Pages/latest-catalyst-windows-beta.aspx

Now, if you're using NVidia video card, you can give a try to this (but I can't guarantee success in this case): http://www.nvidia.com.br/Download/Find.aspx?lang=br

Hope it can help. =]