My usual response once I'm doing looking things up to write/build something, and look up to see more than 5 tabs, is to go "ARRRGGGHHHH" and declare tab bankruptcy, just closing the browser completely.

There's always history, and bookmarks if you need to really keep something.

Currently I have 3 tabs open, Braid Solitare, HN Active threads, this edit window. I'll probably put on an HFY story from youtube for background noise in a minute, after I post this edit.

3 is a good number of tabs. Sproutlet, the kid, usually has many dozens, and if there's going to likely be a power interruption, I warn them to save their work, just in case.