Steve, who has hidden browser tabs open to Facebook all of the time during
work, is a real Zucker.
Factoid: Zucker, as a noun, can be modified in many ways:
"motherZucker": the mother of all Zuckers;
"Zuckerdoodle": a
dog with its own Facebook page;
"Zuckface": a
person who uploads umpteen selfies per day and/or changes their Facebook profile photo every day/hour/minute/second.