cleanup of extension driver attachment and event registration
cleanup of extension driver attachment and event registration

cedricbellet/lighthouse,deepanjanroy/lighthouse,mixed/lighthouse,GoogleChrome/lighthouse,arturmiz/lighthouse,cedricbellet/lighthouse,ev1stensberg/lighthouse,arturmiz/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,umaar/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,GoogleChrome/lighthouse,umaar/lighthouse,arturmiz/lighthouse,GoogleChrome/lighthouse,tommycli/lighthouse,deepanjanroy/lighthouse,cedricbellet/lighthouse,cedricbellet/lighthouse,mixed/lighthouse,ev1stensberg/lighthouse,tkadlec/lighthouse,mixed/lighthouse,mixed/lighthouse,tkadlec/lighthouse,wardpeet/lighthouse,tommycli/lighthouse,cedricbellet/lighthouse,deepanjanroy/lighthouse,tommycli/lighthouse,tkadlec/lighthouse,wardpeet/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,ev1stensberg/lighthouse,deepanjanroy/lighthouse,deepanjanroy/lighthouse,tkadlec/lighthouse,GoogleChrome/lighthouse,umaar/lighthouse,wardpeet/lighthouse,ev1stensberg/lighthouse,tommycli/lighthouse,tommycli/lighthouse