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On your user profile page there are six (6) tabs; stats, activity, reputation, favorites, prefs and accounts.
I would like to see in a new tab, maybe named 50 latest viewed questions, which would contain the 50 latest viewed questions.
This would help when I want to follow a question but don't want to bookmark it or add it to my favorites list.
Sometimes, or a few hours later, I can't even find it again. I think this would be good for when you're viewing questions at work and want to check it up at home but can't because it's not in the same browser history.