Version: 0.2 Fixes the problem of random thumbnail used by Facebook when someone like/share
Plugin will set the thumbnail used by Facebook to featured thumbnail if available, then fallback to first image of the post and then fallback to a default image as a last resort. Also it will use the default image for your front page and for anything else, it will use the first image of the first post of the loop. You can read explaination on this post - Facebook Like Thumbnail WordPress plugin