Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.
Tab Stash is a no-fuss way to save and organize batches of tabs as bookmarks. Sweep your browser clean with one click of the Tab Stash icon. Your open tabs will be stashed away in your bookmarks, conveniently organized into groups.
Sync Tab Groups is an easy way to manage all your tabs. You organize them depending on a topic by group. Groups can be closed and reopened without caring about your session. You can easily search, active, move, save and remove your groups and tabs.
Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.
The extension is no longer updated and it doesn't work on Firefox 57. It still works on XUL-based Firefox forks like Waterfox
Mark is a minimalist tab manager that organizes tabs as you browse. With Mark, tabs are automatically grouped by domain and sorted alphabetically so you can easily find them later.