You could search this forum, this topic comes up a couple time a month.
http://discussion.autodesk.com/forums/search.jspa?threadID=&q=Browser+bar+missing&objID=f78&dateRange=last90days&numResults=15
Or you could search around in the "view" menu.
This is how I would got about getting my browser back...
Cheers and good luck!
Ryan
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