Please first try to launch Firefox in Safe Mode: Diagnose Firefox issues using Troubleshoot Mode

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.

Tried safemode, it still crashes.

Here's my last 5 crash reports: bp-b9d184ae-9ce5-4cd1-add5-45e552150726 7/26/15 12:28 PM bp-a7e05ab8-b53e-4d18-bf6c-cf9432150726 7/26/15 12:27 PM bp-6e7b71a7-4824-41cb-a192-e066a2150726 7/26/15 12:27 PM bp-6bf514d8-b261-48f7-95b7-7fc762150726 7/26/15 12:26 PM bp-5cebfbdd-720c-44ed-a0d3-f0dc22150726 7/26/15 12:26 PM

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'm running the most current version of flash - 18,0,0,209

@prestontoborg thanks for the help on this one! jksyak, what were the results of the suggested troubleshooting?

guigs said

@prestontoborg thanks for the help on this one! jksyak, what were the results of the suggested troubleshooting?

I'm using the latest version of Flash, Turned off HW acceleration, restarted FF, still crashing. Note: I don't get a message saying Flash has crashed, the whole browser crashes.

I'm guessing it might have been something on Youtube's end, as of today it's working again, and I've changed nothing on my end. Thanks for all your suggestions!

Just when I thought I was out of the woods, this site just crashed my browser. (sorry about the subject matter)

http://uproxx.com/sports/2015/07/red-sox-puking-fan/

Do new crash reports still have the same signature if you click the link on the about:crashes page?

If you have submitted crash reports then please post the IDs of one or more recent crash reports that have a "bp-" prefix:

• bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

You can find the report ID of recent crash reports on the "Help > Troubleshooting Information" page (about:support).

• Click the "All Crash Reports" button on this page to open the about:crashes page and see all crash reports.

If necessary then you can open about: pages via the location/address bar.

See:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter
• https://support.mozilla.org/kb/Mozilla+Crash+Reporter

You can try to disable the HTML5 media player as a quick test for issues and set the media.apple.mp4.enabled to false on the about:config page.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

Thanks cor-el, that did it!

FWIW, here is the crash report from the crash just before I disabled the HTML5 media player

bp-8a2a2131-de8f-4f71-b97a-df8242150803