When I start Firefox 4 or open a new window it pulls up a box saying TypeError: this._nativeWrapper is null
throughout all the betas and also in the final release, whenever i try to start firefox 4 in any way in pulls up a window saying "TypeError: this._nativeWrapper is null" This also happens when i open a new window off the main one, though not on tabs
Alla svar (2)
This may be due to a problem with an add-on. For details of how to troubleshoot that see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
this is a problem with add-on. you have installed a software on your computer, it has installed an add-on on firefox, then you uninstalled the software but the add-on remained there making the error report each time you start the firefox. go to "manage add-ons" and see which one is there but you removed the software itself.