Tab Groups is a productivity app designed to help users manage their tabs in their web browsers. It allows you to group, organize, and categorize tabs in your browser, making it easier to find and work with the tabs you need. It also provides a convenient way to save and retrieve the tabs you need for specific tasks or projects. Tab Groups also allows users to share tab groups with others, making it easier to collaborate and work on shared tasks. With Tab Groups, users can quickly and easily access the tabs they need when they need them.
Tabs Outliner
Simple Tab Groups
Conex
Tab Workspaces
Simplified Tab Groups
Discontinued. The extension currently does not work in Firefox 57. It still works in XUL-based Firefox forks such as https://alternativeapp.info/software/waterfox/.