Don't usually copy and paste stuff but thought this was relevant:
Just turned mine off.
Are you aware of a new feature that Facebook added since the February 1st update?
Did you know that over the past 8 weeks Facebook has been monitoring and tracking what you do when you're OFFLINE and not on Facebook.
I just checked to verify and there were records of every website I’ve visited and apps I’ve used including bank and credit card sites.
You don’t have to take my word for it...go check it out and see what they are seeing—AND THEN SHUT IT DOWN with these easy steps:
Go to Facebook settings and scroll down to [Your Facebook Information]. Click on “Off-Facebook Activity” and if you’re curious ... check out the list of what “they” are seeing in [Manage Your Off-Facebook Activity].
Shutting this down is easy. . . in the same setting, click on 'More Options' and Go into [Manage Future Activity] and turn it OFF. I also cleared my history...