Just in case you're open to something new: Tree Style Tabs is my goto extension to managing tabs on firefox
You manage your tabs vertically in a sidebar, organized as a tree. Every new tab is opened as a leaf from the tab that you came from, grouping your tabs by branches following your navigation on the web. This make managing groups of tabs by topics really natural.
You manage your tabs vertically in a sidebar, organized as a tree. Every new tab is opened as a leaf from the tab that you came from, grouping your tabs by branches following your navigation on the web. This make managing groups of tabs by topics really natural.