Their invite requirement turned me off from the start.  The more bells and whistles I hear Alby adds on, the more I appreciate nos2x for simple browser extension needs. 

 Nos2x is insecure  

 Of course it's insecure.  All browser extensions are insecure. 

 That's not true.  

 If there could be browser extensions that are secure, then there would be no market for hardware wallets.