I am experiencing a Firefox crash when I tried to upload images to WordPress using the built-in WordPress Flash image uploader. In Google Chrome it works fine but Firefox crashes immediately when i try to upload an image.
The issue seems to be caused by the Google Gears extension for Firefox, I am using Google Gears to speed up WordPress on the local machine. If I disable the Google Gears extension the wordpress image uploader works fine. Strangely the problem occurred yesterday for the first time and it is continuing, i don’t remember updating Google Gears addon for Firefox or Firefox itself.
There is an option in Google Gears settings to selectively disable a single site or more, i tried this option also but it is not a solution as Firefox is still crashing. The only option now is to completely disable Google Gears or just use another browser like Google Chrome or Opera.
Same problem with my sites, thanks for your advice.
This problem started for me yesterday, also after no Gears, FF or WP updates I’m aware of. Thanks for the tip!
Thank you for this fix! It was driving me crazy to have to switch to IE just to upload images to my posts. I also don’t remember updating any of Gears, Firefox, or WordPress. Strange.
I had the same problem. Uninstalled Gears and it works great now.
@Ally, Becca, Sha Sha, Greekspeedoman
Glad that it is useful for you all
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Wow, thanks! I disabled Google gears and now the insert function works like a champ. Same scenario all around for me. Really appreciate your troubleshooting this one!
Thank you, thank you for posting this. I was going insane!
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Thanks! That fix worked. Uploading fine now.
I am not using Google Gears, but sill I facing this issue.
But this is not consistent. It happens randomly.
Can anyone show some light?
Thanks and Regards,
Vijay
Same problem ! thanks for helping me finding the plugin causing trouble !
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@iheartwordpress – thanks
everything’s fine now 
It seems WP2.8 has fixed the problem… Does anybody confirm that?
@Renato
Yes you are right, the problem is fixed with WordPress 2.8 upgrade.
Hello…
I’m having firefox crash on my new Toshiba notebook.
I can’t find google gears anywhere on this computer. What else could be causing the crashes?
Thanksm
Stan