Do you have any crash ID's? You can type about:crashes into the address bar, hit Enter, and copy and paste the crash ID numbers into this thread. They being with a bp-.

bp-ab914587-9233-4f38-a6c9-2b8f02120614

There is a bug report attached to the crash report that seems to be fixed in the next Firefox Beta (current is beta 7)

• https://crash-stats.mozilla.com/report/index/ab914587-9233-4f38-a6c9-2b8f02120614
• bug 753248 - [10.7][10.8] crash in coreclr with Silverlight applications with builds made on OS X 10.7 (Lion)

You can try Firefox 14 beta 8 next week to see if that fixes the problem.

• http://www.mozilla.org/en-US/firefox/beta/

I tried uninstalling silverlight and then reinstalling twice in Firefox14.0 without success. I wondered if the plug-in for silverlight left behind in firefox made a difference. before testing that idea.. I open my Opera v 12.0 Brower and found out I could play Netflix on that browser... Whatever that means.

While some folks say this is a Microsoft-Silverlight problem, seems to me Firefox 14.0 has some quirks to work out too.

I had this problem too. Here's a sure fix for MAC users:

1. Access your hard drive (double click the hard drive icon in finder)
2. Find the silverlight plugin (navigate to your Internet Plug-Ins directory: /Library/Internet Plug-Ins/)
3. Remove the silverlight plugin (drag any of the following into your trash bin:

      * Silverlight.plugin 
      * WPFe.plugin

1. Empty your trash bin
2. Go to www.microsoft.com/getsilverlight/ using your Firefox browser.
3. Download and install silverlight
4. Restart Firefox