Try Bartab Plus - https://addons.mozilla.org/en-US/firefox/addon/bartab-plus/ https://addons.mozilla.org/en-US/firefox/addon/bartab-plus/ Bartab Plus can actua

Try Bartab Plus - https://addons.mozilla.org/en-US/firefox/addon/bartab-plus/ https://addons.mozilla.org/en-US/firefox/addon/bartab-plus/ Bartab Plus can actually completely unload a tab after X amount of minutes / hours. The tab is dimmed and comes back / reloads automatically when you click on it. This along with tab groups - https://addons.mozilla.org/en-US/firefox/addon/tab-groups-panorama/ https://addons.mozilla.org/en-US/firefox/addon/tab-groups-pa... allows you to have hundreds of tabs at your fingertips across any number of groups, without paying the performance impact of having them all actually loaded at once.