If you are interested in grouping the tabs, have a look at this addon: https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/ https://addons.mozilla.or

If you are interested in grouping the tabs, have a look at this addon: https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/ https://addons.mozilla.org/en-US/firefox/addon/tree-style-ta... It allows you to use your tab-list in a hierarchical way, sort of like a filesystem. I group things under obvious roots, and then collapse it till needed.