Simple Tab Groups od simple_tab_groups

Too many tabs can make Firefox feel weirdly stressful after a few hours. Simple Tab Groups fixes that by letting users separate tabs into different categories instead of keeping everything mixed together.

Useful for things like:

Work projects
Study materials
YouTube or music tabs
Shopping comparisons
Random “I’ll read this later” pages

The extension feels lightweight and surprisingly comfortable once the groups are set up. Switching between tasks becomes faster, and the browser no longer looks like complete chaos at the top of the screen.

A small tool, honestly, but one of those add-ons people keep installed for years because daily browsing just feels better with it.