[fowlerje]

This is a great start.

I wouldn't mind having a side tray or list of temporary bookmarks that I could easily add to, restore from, or remove. Then I would have 3 or 4 active tabs and about 15 inactive tabs and could swap between them easily.

I know it is possible with shift + cmd + D, as one commenter pointed out, to bookmark all tabs temporarily but that would get cumbersome if you were constantly changing out tabs.