Scenario: You're trying to find out information about a restaurant or event on Facebook but you're not logged into Facebook. Maybe it's because you're not a member or maybe because you try not to use Facebook at work.
Either way, you're stuck with this big white box blocking what you'd like to read.
Here's a bookmarklet for getting rid of that box:
javascript:(function()%7Bdocument.getElementById('pagelet_growth_expanding_cta').style.display %3D 'none'%7D)()
If you don't know how to install a bookmarklet, search the web for "install bookmarklet" or try this page