People are shocked when they see how many tabs I have open. I just checked and I've 21 windows each with atleast 10 tabs, but the more frequently used one are 30+. But it really does help. I also group them by topic and when I need to focus I start a new window with the tabs for that particular task.
How it comes? Well, I just don't close them until I have decided whether I want to bookmark them. After month with a browser sessions quite some tabs pile up. (When it gets out of hands I bookmark whole windows… So there remains at least the theoretical possibility that I sort this out later. Even that happens only rarely.)
Before someone asks: From the technical standpoint it's quite easy to have so many open tabs. All you need is Firefox, Tree-Style-Tabs, and tab auto discard ("sleep"). It fits than in under 2.5 GB RAM even (which is less than Chrome with even a few tabs).
