So you just downloaded Flock, fell in love with it and believe this is the browser for you. Previously, you already installed all the preferred plugins for firefox , yet Flock does not see them on Ubuntu? Where are the Flock plugins on ubuntu! Not to worry, just paste this into a terminal window as you see it below:
cp -r /usr/lib/mozilla-firefox/plugins /$HOME/flock/
Neat, huh? Needing more help getting Flock setup to be your new default browser? Not a problem.