Crashes or other problems with certain multimedia content in Firefox (such as YouTube videos and Flash animations or games) can often be resolved by performing the steps in these Knowledge Base articles:

• Flash Plugin - Keep it up to date and troubleshoot problems

• Adobe Flash plugin has crashed - Prevent it from happening again

Please tell us if this helped!

I've already updated the Adobe Flash Player and have tried disabling it. It is not the Adobe Flash plugin that is crashing. Firefox itself crashes and closes everytime I open a Youtube video. I have had no other problems playing other videos on Firefox. I just now noticed that it also crashes and closes when I get to the third page on Tumblr. The first and second pages of my Tumblr feed are fine, but when it gets to the third page it crashes and shuts down. I can get on the main Youtube page and my subscriptions page just fine, but when I try to play a video it crashes.

We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.

1. Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
2. Copy the 5 most recent Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

Thank you for your help!

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

bp-99020f5a-d70c-43ff-a6c4-ce9092150530 bp-a99dee4f-b1e1-42bd-9706-ccea42150529 bp-9241e272-5262-4507-af8f-b4b8c2150507 bp-7550ec26-cd00-45ac-90a0-a6eab2150502 bp-60d85a73-f7ee-45e9-80b9-1a0292150415

I'm not sure if this will help, because there weren't any crash reports yesterday. It just shuts down completely when I open a Youtube video.

Hi, I think Disabling Hardware accelerator of Flash Plug-in might solve this problem. 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.

Otherwise, You can Watch Youtube Video in HTML5 Player To do so, please do following

• Go to https://youtube.com/html5
• click on Use html5 Player

Hope this solves your problem Does this solve the problem? Let us know.

Hi there, using Firefox 40.0.3 for Linux Mint 1.0

I can get embedded youtube videos to play just fine. I can go and search for videos, 90% of the time, this will cause a crash, and I always send in the error to Mozilla. I figured maybe it's because I've activated html5. I don't know how to put it back at using Flash again, after the Flash panic a month ago with the 4 updates in 3 weeks, I said eff it and went to youtube.com/html5. I don't know how to have flash take over again though, just to verify if that's the issue (hopefully not, I much prefer html5 but for now I'll keep using flash if it means no crash as soon as I click on a video after the search.

It's not any of the plugins I have, I turned them all off to try and nope..no issue,so I have to turn on Chromium. Is Firefox using multithreading now and this would be the errors caused by it being in its infancy using multithreading?

It's severely annoying I gotta say!

Hello,

I had this problem on Gnu/Linux (debian 7.x), recently. So I had a look on the problem, it turns out when looking at the trace that firefox call gstreamer. So I tried to disabling it, and youtube works perfectly now. (I have no idea of the side effect of disabling gstreamer), but if you would like to do so, then all you have to do is : 1. go to about:config 2. look for media.gstreamer.enabled 3. set it to false. Done

If you disable GStreamer on Linux then YouTube will likely fallback to a Flash based player. You can also use an extension to switch between the Flash player and the HTML5 media player on the YouTube website.

YouTube Flash Video Player:

• https://addons.mozilla.org/firefox/addon/youtube-flash-video-player/

Note that the OP (thread owner) is using a Mac, so if you are on another operating system then best is to create a new thread to avoid confusion.

hum ... Actually firefox seems to handle htmlvideo (which is used in youtube with the html5 player). But the side effect of not having gstreamer is video playing with video/mp4 youtube does not specify any type in the video element. So it seems it is okay.

Like the OP, I'm using a Mac -- same kind of problem. Also, like the OP, there are crashes that don't leave a crash report. Following the same instructions given her, here's what I see: bp-30c1eeb3-e697-4845-9858-f53642151113 11/13/15 9:33 AM bp-eaaba1af-740e-4cc4-85da-a28262151113 11/13/15 9:26 AM bp-c66eca3a-dd84-4f9c-a9d9-e43e02151111 11/11/15 2:54 PM bp-ff93fde8-8c22-4a82-aff9-897f12151111 11/11/15 11:16 AM bp-2c6f5117-d27d-4993-b5ee-749132151109 11/9/15 11:58 AM

Hi ankh

Did you check for font issues?

• https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

You can check for corrupted and duplicate fonts and other font issues:

• http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts
• http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html

You can try different default fonts and temporarily disable website fonts to test the selected default font.

• Firefox > Preferences > Content : Fonts & Colors > Advanced
• [ ] "Allow pages to choose their own fonts, instead of my selections above"

Make sure to restore the default setting and allow pages to choose their own fonts when you are done with testing.

Possibly a clue -- from testing the above suggestions, crashes the same EXCEPT two out of three do not have the "bp" prefix -- if that's a clue:

bp-d0ce0b80-6775-4da4-9da3-bc0092151113 11/13/15 2:30 PM

9A340A4B-41AE-44A0-BABB-AC5FA8313A06 11/13/15 2:21 PM

EBAB5F8A-C47B-45C4-864E-8137D562199F 11/13/15 2:17 PM

Test page for crashes: https://www.youtube.com/watch?v=Mx0xCI1jaUM

Font issues -- that link takes me to a list of things; tried each of them -- no updates; hardware acceleration is and has been off; disabled webGL -- no change, still crashing.

thexlab -- link doesn't work, pursuing it gets the generic Apple support splash page. What's FontBook 2.0? Never used it.

I've used "Font Doctor" -- current, and automatically scans for problems intermittently. Did a manual scan and all checked OK, no problems reported by that.

creativetechs -- opens to a commercial support business page

disable fonts -- makes no difference whether pages choose their own fonts or not

and one more as I finished editing the above and closed out: bp-ce76cd00-0fd2-4909-8b60-ac37b2151113 11/13/15 2:36 PM

gstreamer has a number of issues, whose bugs are marked as blocking https://bugzilla.mozilla.org/show_bug.cgi?id=1208910. This includes crashes such as https://bugzilla.mozilla.org/show_bug.cgi?id=1123235