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Firefox Developer Edition "has stopped working" when playing Youtube videos

  • 5 replies
  • 1 has this problem
  • Last reply by Bewn

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As of about a week or two ago, my Firefox Developer Edition has been having "Firefox Developer Edition has stopped working" crash messages when playing Youtube videos. The error message will display roughly 4-5 times, and then the video will play. The browser itself never crashes.

I only have Ublock Origin and Reddit Enhancement Suite for addons, and I've disabled both of them, however the browser still has these crash errors. I have also run the browser in Safe Mode, which didn't yield any different result. I even cleared my cache, but no difference there as well. Lastly, I disabled hardware acceleration on the off-chance that this was the issue.

I did uninstall and reinstall FDE, but also failed to change results. What else can I do?

All Replies (5)

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Separate Security Issue: Update your Flash Player or remove it using these links; Uninstall Flash Player | Windows {web link} Uninstall Flash Player | Mac {web link}

Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only> Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers

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Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

While still in Safe Mode,

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP- in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most recent 7 - 10 Submitted crash reports, and copy them. Now go to the reply box and paste them in.


For more help on crash reports, see;

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I updated my flash to v32, but no change in the issue. I opened Firefox in safe mode and looked at about:crashes but it says no crashes have been submitted. I don't think this is a crash. As mentioned, the browser doesn't close. It just pops up the "Firefox has stopped working" error window 4 times (with options to debug or close), and then it's fine after that and the Youtube video plays.

If I try the debug option on the window, it gives me the choice to open Visual Studio, but when it opens, it says it cannot attach the process. So no help there.

I did a Firefox reset as well, and no change to the issue.

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What were you doing at the time? surfing, watching a clip, reading an article . . .

Any problem using Safe Mode?

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The problem happens when I begin playing a Youtube clip. It can be the only tab open.

It is happening while in safe mode as well.

When I click play on the Youtube clip, the browser hangs for a bit, then starts spitting the "has stopped working" error windows (always 4 of them), and then the video plays.

As mentioned, I've disabled all addons, I've uninstalled and re-installed FFDE, I've tried safe mode, I've reset my profile, I've updated my flash (even though YT vids should be html5), and I've restarted my PC just to rule that out.

Youtube plays just fine in Chrome.

I may just re-image this PC if this continues. Thanks for your help though. I appreciate the effort.