|User since||September 5, 2011|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Rated 4 out of 5 stars|
Great work Rated 5 out of 5 stars
The addon works well (tested on Linux x86-64), unfortunately Google has browser whitelist which only allows Chrome to be used with U2F (you won't even get U2F prompt with Firefox).
It would be nice if somebody added info on compatibility with other services - here is a list of services that should support U2F: http://www.dongleauth.info/