I used to have those kinds of hundreds of tabs in multiple windows until I found Onetab: https://addons.mozilla.org/en-US/firefox/addon/onetab/ https://addons.m

I used to have those kinds of hundreds of tabs in multiple windows until I found Onetab: https://addons.mozilla.org/en-US/firefox/addon/onetab/ https://addons.mozilla.org/en-US/firefox/addon/onetab/ Still using Tree style tabs for their sub tabs feature which helps keeping things organised for me.