WordPress Image Uploader Crashing Firefox
Since Wednesday there have been a rash or reports on WordPress.com about Firefox crashing when WordPress users try to upload images via WordPress image uploader.Chances are if you’re having this problem you’ve got gears installed. For the time being you’re going to need to disable Google Gears if you want to use the uploader. As far as I can tell this happened with an update of Firefox or Gears since the problem is new and WordPress hasn’t come out with more than a beta version update of WP.
How do you disable Gears? Go to Tools > Add Ons > Gears and click disable then restart Firefox.