Can you use gears inside of a firefox extension?

[Chris]

i am trying to write a firefox extension that will rely on gears, but
can't seem to figure out if this is possible. as of now, i am getting
an error when calling new GearsFactory()

error details
name : NS_ERROR_FAILURE
QueryInterface : function QueryInterface() {[native code]}
message : Failure
result : 2147500037

anyone know if this is even possible and if so, any resources for
using gears in a extension

thanks,

chris