philc/vimium — comment on commit 5a663e6b2ffd5f55e518f89ce693eca0bfed134f
File: vimiumFrontend.js line 490
By int3:

This change traps the ESC key for all sites, instead of just on Google's instant search. So the behavior on G sites should remain unchanged, but we'll also avoid problems like closing FB chat windows when quitting insert mode.