Firefox can't play youtube videos (only from youtube, other video sites work well)

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• I can't play any video site Fox

  I can't play any video on Fox.com with FF. I updated adobe flash as your recommended blog. still will not play any video. Help, please! Thank you

  You can also view on the subject: addons page if the Flash plugin in active.

  • Firefox/tools > Modules > Extensions

  You can get a Lego icon that is possibly colored on the left end of the address bar Firefox blocks a plugin.

  • https://support.Mozilla.org/KB/why-do-i-have-click-Activate-plugins
  • http://KB.mozillazine.org/Issues_related_to_plugins#Click_to_Play

• I can't play YouTube videos, or open Flash on Firefox-based pages. I have already installed the plugin Flash a number of times.

  Can't play YouTube videos and cannot load Flash components, which work on other browsers.

  There are some compatibility issues between the last Flash drive and a few Add-ons Firefox or settings. Could see you if anything in this article helps you: 11.3 Flash does not load video in Firefox.

• I can't play youtube videos or access games on facebook

  I can't play youtube videos or access games on facebook and some websites, I get only 1/2 the page. It seems that something is blocking my flash. It says that my flash is updated and also of shockwave. I have included 2 screenshots. I started in safe mode and nothing works. Works perfectly in google chrome. The problem is that firefox. Any ideas?
  http://i431.Photobucket.com/albums/qq36/otter2208/YouTube.jpg
  http://i431.Photobucket.com/albums/qq36/otter2208/face-1.jpg
  I goto my plugins and see shockwave flash only. Also, I tried other sites with video and video shoot at all.

  I tried to download an old version, but it would not move for some reason any. I did a system restore and now everything works. I have firefox WILL NOT update until THAT can't solve their problems.

• Why the latest Firefox won't play YouTube videos

  Everything worked fine until the latest version of Firefox, now I can't play YouTube videos. No problem with Chrome or IE. Firefox screwed up something with their latest version. Problem started on 09/03/15.

  1) enter the config by typing about: config in the address bar.
  (2) enter media.mediasource.webm.enabled press ENTER.
  (3) make a right click on it and change to true, for some reason any, defined as 'false', which makes the MSE & WebM VP9 does not work correctly.
  (4) visit: https://www.youtube.com/html5 and check that everything is OK.
  (5) tries to watch a video. It should work now.

• I have not changed my settings of the computer, I didn't accept the offer of update of Firefox and NOW I can't play the video, my music site subscribe to wonder of

  I took the opportunity to update firefox last week (June 9, 2012) and now I can't play the video, I subscribe to a site of learning music and he asked to upgrade me to the latest version of Flash, now I did and my videos still won't play If I use Chrome, I have no problem, Firefox has ruined my system HELP.

  Confirm the Adobe test page that Flash is installed?
  Update the Flash plugin to the latest version.

  • http://www.Adobe.com/software/Flash/about/
  • http://helpx.Adobe.com/Flash-Player.html

  You can find the latest version of the Flash player for Firefox on this page.

  • http://www.Adobe.com/special/products/flashplayer/fp_distribution3.html

• Hello, I need help, I can't play the video using Facebook. Works very well in Youtube. I use Safari. Tried different solutions such as changing preferences, reinstalling Flash.

  Hello, I need help, I can't play the video using Facebook. Works very well in Youtube. I use Safari. Tried different solutions such as changing preferences, reinstalling Flash.

  Hello

  Please try following the steps and see if it helps

  1. Please work through this guide.

  https://helpx.Adobe.com/Flash-Player/KB/video-playback-issues.html

  Follow the instructions in the guide on the provision of the dxdiag report and additional information on what you tested and observed.

  2 turn off hardware acceleration in the settings. Steps are mentioned in the link below

  How to disable or enable hardware acceleration?

  Thank you

• I can't play a video in windows live photo gallery__

  I imported my photos and videos in windows live photo gallery. I can see the pictures, but I can't play the video. When I try I get the message "Photo Gallery can't open this photo or video. The file may be unsupported, damaged or corrupted. "what should I do?

  Hello Nikka,

  Thank you for your message.  What format is the film?  Maybe it's just the format, not that he has not supported, damaged or corrupted.  Please let us know so that we can help you solve this problem.
  See you soon

  Engineer Jason Microsoft Support answers visit our Microsoft answers feedback Forum and let us know what you think.

• I can't play the videos that play in wmv.

  I can't play the videos that play in wmv, I get the error message 80040154. This is the codec that is false and if this what you do need me and how to get it and load it?

  Hello

  ·         Were you able to play WMV files earlier, if yes, then you remember recent changes to the computer?

  ·         What is the accurate and complete error message?

  ·         Are you able to play other files?

  I suggest you to rebuild the Windows media player library and check if the problem follow these steps:

  a. exit Windows Media Player.

  b. click Start, click Run, type %LOCALAPPDATA%\Microsoft\Media Playerand then click OK.

  c. Select all files in the folder and then click on Delete on the file menu.

  Note: you don't have to remove the folders that are in this folder.

  d. restart Windows Media Player.

  Note: Windows Media Player automatically rebuilds the database.

• My desktop version of my site works well but the mobile and tablet versions have any overlap and the entire page. If I can't pin things that it stops?

  My desktop version of my site works well but the mobile and tablet versions have any overlap and the entire page. If I can't pin things that it stops?

  Hi Pedro,

  Make sure that when you design the phone and tablet version to keep in mind the limits of dimensions.

  Please share the url of your site for further analysis.

  Kind regards

  Akshay

• I can't play youtube video?

  I installed adobe falsh and Java, but I can't play the youtube video. Can you help me?

  Hello

  Please select your language from the drop-down menu above to post your question in the language of your choice. The forum in which you've posted is for English only. If you can't find your language above, support for additional international sites options are by following the link below:

  http://support.Microsoft.com/common/international.aspx

• All of a sudden when I open Firefox it starts playing a video on youtube

  Previously, when I opened Firefox I had the normal home page. Now I have the normal home page but I can hear a youtube video starts playing in the background, and when I click on the tab I see that a movie began to play automatically. The movies are related to a topic, earlier I searched on Youtube, but it is not always the same, so, probably, I clicked on something I should not have done. I followed the suggestions of the internet on the home page reset and they did not work. Basically, I can now hear the sound from any video / movie to youtube I chose to play because of the noise from the other, unwanted, one in the background.

  Help! What should I do to resolve this issue and stop these videos?

  With our thanks, Kathryn

  Hello! This must be crazy you! Maybe you've already tried this, but just in case where:
  Type in the address bar about: config (promise to be very vigilant) Type and are looking for: media.autoplay.enabled it of set to "true", change it to false

• Firefox will not play many videos, sounds and other Html5 applications but Youtube is fine.

  No matter what are the options I change (I tried everything under subject: config), videos html5 play not (format not supported, etc wrong mime type.). On youtube, html5 player works fine.

  Examples of videos does not:
  http://techslides.com/demos/sample-videos/small.MP4
  http://techslides.com/demos/sample-videos/small.WEBM
  http://techslides.com/demos/sample-videos/small.OGV
  http://www.html5videoplayer.NET/html5video/MP4-h-264-video-test/
  http://www.webmfiles.org/demo-files/
  http://camendesign.com/code/video_for_everybody/test.html
  flow using the html5 and formats like gif player also like gifv to imgur.

  My OS can all play, I installed Windows Media Player.

  All my preferences in topic amovible.*: config have a default value, and I tried to change things - without success.

  I also disabled all addons/plugins, tried another profile, tried the developer version of 64-bit. I had the same problem on my old computer (I did a clean install on a totally new computer and imported via MozBackUp settings). Firefox Safe mode will not help either.

  http://detectmybrowser.com/ tells me that I can play ogg but not h264 or webm. https://www.YouTube.com/HTML5 told me that my firefox support everything that youtube needs.

  Once again, on Youtube, everything works (right click on the clip not gives me the possibility "about the HTML5 player"), elsewhere (for as far as I saw) I get "not taken in charge or false mime type error format.

  I use Firefox on Windows 10, but also known 40 the problem under Windows 7 and Firefox 3 x

  In addition, my plugin-container crashes whenever I close Firefox, I tried to clear the cache/history/cookies. No idea if this is related to the question of the html5.

  So, any ideas I can try to do html5 video finally work? It is very solutions use another browser every time for anything associated with Html5.

  Holy f * ing sh * t!

  In fact, I managed to solve the problem!
  https://www.YouTube.com/watch?v=9N0OHdRFcJA

  All I had to do was to start Firefox using administrator rights. So simple, yet I didn't on this subject! Why have I never tried this before? I managed to solve a lot of problems like this but never thought about Firefox could also be linked to it.

  In any case, thanks to all who responded, as well as all those who had to read all my rants in this thread!

  Solution: Launch your Firefox with administrator rights

• Can't play m4v videos in Firefox.

  Hello. I was hoping that someone could help me with a problem. I have a html presentation for a class that I teach. (I have created the presentation.) It includes m4v videos and I can not play in Firefox. He said: "no video with format supported and MIME the type found. I can play the videos if I open them outside, but I need to work in the presentation. Help, please. Thank you.

  Firefox can not read files with the file extension .m4v via audio or video tag that those are not supported file extensions. You can only read these files via the object tag to use a plugin that supports this file Firefox extension. You can force it to use a specific plugin by specifying a type (type = "application/x-mplayer2").

  <object data="file://<path to file>" type="<to force a specific plugin>"></object>

• Can't play YouTube videos via HDMI cable

  After you perform a search on this subject throughout this forum, I discovered most people go on wild tangents that are unrelated to the topic at hand. They can be fun; they can also be deep; but they are not answering my question. :-(

  Yesterday, I received my microHDMI to HDMI cable and was eager to try to play a YouTube via my TV. Make the right connection with the TV turned on and booted up the Xoom to the YouTube app. Nothing appeared on my TV screen.

  The cable is defective? I missed something in the translation? Later that night, I connected the Xoom to the TV again, this time only to the homescreen of the Xoom. The home screen is appeared on television! Joy! Then I tried YouTube through the browser instead of the YouTube app. Video opening appears on TV and the noise continued to play. BUT the image are remained frozen on the first frame of the video! :-(

  What should I try next? I'm very happy with everything I've tried so far on the Xoom, but it would be very useful to be able to play videos YouTube on the TV. More specifically, when I'm in the kitchen, cooking or baking, I was able to follow good food that are available there as well as some of the videos. If I succeed, I could even be encouraged to buy a Motorola Bluetooth keyboard to control the Xoom to TV in the kitchen.

  Thanks to all those who provide knowledgeable advice-

  I just tried again to play YouTube in my Xoom via the HDMI cable using the YouTube app.

  It worked perfectly! I also tried a video on CNNNews and that worked too.

  Am unable to explain my failure yesterday, except - think - you polishing off a few gallons of Kentucky Bourbon could have an effect? ;-) ;-) ;-)