Cross-browser: detect blur event on window

Question

I just read, I think all the thread that deals with this subject, and I can\'t find a real solution to my problem. I need to detect when the browser window loses its focus, i.e.

Answer 1

It appears that jQuery no longer supports these tests for FireFox:

• jQuery bug ticket is here: http://bugs.jquery.com/ticket/13363
• jQuery close/deprecation commit is here: https://github.com/jquery/jquery/pull/1423

I am searching for a better way to support Firefox blur eventing, but until I find a better approach, this is a more current status relative to the original accepted answer.