Multiple bookmark bars

The browser only ever shows one bookmark bar. With this extension you keep as many bars as you like - one for "Work", one for "Personal", one for "Project Foo", one for "Reading" - and switch which one is currently on the toolbar. The active bar looks and behaves exactly as if it were your only bar; the others wait out of sight until you switch to them.

A typical setup: start with everything in your current bar, create a new bar for each context, fill each one with just the bookmarks it needs, then switch between them as you change tasks.