Type about:addons in URL and Goto Plugins

• Check all the plugins are "Always Active"

Somewhere on the page right click, go to view page info > permissions and make sure that adobe flash content is allowed to play on that domain.

Flash in Protected mode occurs issues too

• http://kb.mozillazine.org/Flash#Flash_Protected_Mode_issues_on_Windows_Vista_and_above
• http://forums.adobe.com/thread/1018071

Hi, Thank you for the quick reply, Unfortunately the problem remains. All of my add-ons are set to Always Active. I couldn't right click anywhere on that page to vue permissions but I did carry out the task from the first link and set protection to 0 for the mms.crg file. Still no change. And I don't have the plugin mentioned in the last link either...

Youtube videos still appear black as the page loads then disappear a second later, if i scroll down/up the page the video element flashes black then reverts back to grey/invisible. Any more ideas? :/

You didn't provide us anything about your system.

• Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

• At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

Application Basics

Name: Firefox Version: 28.0 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0

Crash Reports for the Last 3 Days

All Crash Reports

Extensions

Name: Adblock Plus Version: 2.5.1 Enabled: true ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

Name: Add to Amazon Wish List Button Version: 1.10 Enabled: true ID: amznUWL2@amazon.com

Name: iCloud Bookmarks Version: 1.2.12 Enabled: true ID: firefoxdav@icloud.com

Name: LastPass Version: 3.1.1 Enabled: true ID: support@lastpass.com

Name: RealDownloader Version: 17.0.9 Enabled: true ID: {53D8DD28-1C83-41F3-B171-C2ED5B3E5DE8}

Name: Skype Click to Call Version: 7.1.15383.6004 Enabled: true ID: {82AF8DCA-6DE9-405D-BD5E-43525BDAD38A}

Name: Troubleshooter Version: 1.1a Enabled: true ID: troubleshooter@mozilla.org

Name: Wajam Version: 1.26 Enabled: false ID: {5a95a9e0-59dd-4314-bd84-4d18ca83a0e2}

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.disk.smart_size_cached_value: 358400 browser.places.smartBookmarksVersion: 6 browser.search.param.yahoo-fr: chr-greentree_ff&ilc=12&type=714647 browser.search.useDBForOrder: true browser.sessionstore.upgradeBackup.latestBuildID: 20140314220517 browser.startup.homepage_override.buildID: 20140314220517 browser.startup.homepage_override.mstone: 28.0 dom.mozApps.used: true dom.w3c_touch_events.expose: false extensions.lastAppVersion: 28.0 font.internaluseonly.changed: false font.size.variable.x-western: 17 gfx.direct2d.disabled: true gfx.direct3d.checkDX10: false keyword.URL: http://uk.search.yahoo.com/search?fr=greentree_ff1&ei=utf-8&ilc=12&type=714647&p= layers.acceleration.disabled: true network.cookie.prefsMigrated: true places.database.lastMaintenance: 1397477977 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true plugin.state.java: 2 privacy.cpd.offlineApps: true privacy.cpd.siteSettings: true privacy.sanitize.migrateFx3Prefs: true privacy.sanitize.timeSpan: 0 security.warn_viewing_mixed: false storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1397391554

user.js Preferences

Your profile folder contains a user.js file, which includes preferences that were not created by Firefox.

Graphics

Adapter Description: NVIDIA Quadro FX 770M Adapter Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Adapter RAM: 512 Device ID: 0x065c Direct2D Enabled: Blocked for your graphics driver version. Try updating your graphics driver to version 257.21 or newer. DirectWrite Enabled: false (6.2.9200.16571) Driver Date: 5-12-2010 Driver Version: 8.16.11.8992 GPU #2 Active: false GPU Accelerated Windows: 0/1 Basic Blocked for your graphics driver version. Try updating your graphics driver to version 182.65 or newer. Vendor ID: 0x10de WebGL Renderer: Blocked for your graphics driver version. Try updating your graphics driver to version 182.65 or newer. windowLayerManagerRemote: false AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.3 Version in use: 4.10.3

NSS Expected minimum version: 3.15.5 Basic ECC Version in use: 3.15.5 Basic ECC

NSSSMIME Expected minimum version: 3.15.5 Basic ECC Version in use: 3.15.5 Basic ECC

NSSSSL Expected minimum version: 3.15.5 Basic ECC Version in use: 3.15.5 Basic ECC

NSSUTIL Expected minimum version: 3.15.5 Version in use: 3.15.5

Two things:

• You said you have Firefox 25. That's not the latest version. Latest is 28 with 29 coming out at the end of this month.

• Some problems with Flash video playback can be resolved by disabling hardware acceleration in your Flash Player settings. (See this article for more information on using the Flash plugin in Firefox).

To disable hardware acceleration in Flash Player:

1. Go to this Adobe Flash Player Help page.
2. Right-click on the Flash Player logo on that page.
3. Click on Settings in the context menu. The Adobe Flash Player Settings screen will open.
4. Click on the icon at the bottom-left of the Adobe Flash Player Settings window to open the Display panel.
   
   The image "fpSettings1.PNG" does not exist.
   
5. Remove the check mark from Enable hardware acceleration.
6. Click Close to close the Adobe Flash Player Settings Window.
7. Restart Firefox.

This Flash Player Help - Display Settings page has more information on Flash Player hardware acceleration, if you're interested.

Does this solve the problem? Let us know.

Sorry that was a typo, My current version of firefox is 28.0

As for the flash hardware acceleration; I can't see a flash logo to click on that link you sent (Adobe Flash Player Help page) So I couldn't get the settings menu up. I assume seeing as my flash plug-in isn't working I can't see the logo.

Still stumped... Perhaps it's to do with my PC not firefox?

I should've known that you had a typo since v28 was listed in your Troubleshooting info.

Do you still have this problem in Safe Mode? If you don't, it's most likely one of your extensions/plugins. You can troubleshoot your plugins by entering Safe Mode. Follow the directions below to enter it:

• Click Help > Restart with add-ons disabled
• Click Start in Safe Mode in the dialog box that comes up.

If you don't see the problem occurring, it's one of your extensions. You should first disable all extensions then re-enable them one by one to find out which is causing this issue.

Restarting in Safe-Mode had no effect on the flash video.

I did however find a software update for my graphics card -__- Stupid me right? But then when I installed it I got window's famous blue screen of death. So maybe that driver update is all i need, maybe not but I don't know how to find out... this is really a problem for a different forum now...

Did you try to disable protected mode in the Shockwave Flash plugin?

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

I just posted a solution to my "videos won't play" problem.

Videos won't play - Comodo Firewall

Your situation may be different. But I'd recommend that you carefully check your firewall settings.