FB Follower for Chrome
More About FB Follower
FB Follower is a Chrome extension to add multiple friends on FB quickly.
HOW IT WORKS:
It simply adds a button to FB pages: "Add them all!".
If you use it, the extension will simulate you're sending friend requests to all the users on the page: it will scroll to the first "Add as a friend" button, click it, then wait a for a few and go for the next one... easy!
It works with the search results, members of a group,... well, any page where a "Add as a friend" button appears. :)
It also lets you to "Stop" the action you began.
Doesn't worry about FB limits (per day, per account,...).
May stop working if FB changes its layout.