Many websites work on one platform. I like this tab manager.

Being able to work relatively efficiently, effectively, and simultaneously on a half dozen or more WordPress client website projects at once. It also allows me to put a project "to bed" and wake it up again in the future, with all necessary tabs intact.

This was very easy to learn and gave me a place to organize all my tabs, notes, resources, projects, and to-do lists. I could not live with out this.