it happened as soon as i downloaded the new update

We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.

1. Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
2. In that text field, enter %APPDATA% and press Enter. An explorer window should open.
3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
5. Open the most recent 5 files with a text editor and copy the IDs.
6. Paste each ID with bp- into the reply window on the forums.

Thanks in advance!

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

the 1st step doesn't happen for me nothing is coming up

Sorry your Firefox is crashing . Here are quick fixes to prevent this from happening again .

• http://mzl.la/MYlG5D

Hello ZachAttack,

the new Flashplayer (13.0.0.182) on mac is the problem for your crashes in youtube page.

Adobe is promoting a downgrade to Flash 12, see analytical info in John99's reply , see also why Adobe is promoting a downgrade to Flash 12 instead of the more secure Flash 11.7 ESR on MAC with SAFARI in AliceWyman's post.

thank you

The 13.0.0.182 version of the Flash plugin is crashing on some older Mac computers due to the compiler generating incompatible code.

See also:

• Adobe Community: ATTENTION MAC CUSTOMERS - Flash Player 13 "Plugin Failure" Workaround:
  http://forums.adobe.com/thread/1447282

Finally thank you for helping me, I was beginning to think i was never able to use this browser ever again.