Limit the number of open tabs – in total and per window
What is Tab Limit?
Tab Limit is a Firefox add-on that helps you control and manage your open tabs. With Tab Limit, you can set a maximum number of tabs for both the entire browser and individual windows, preventing tab overload and improving your browsing experience.
Tab Limit is safe to use. It does not request any sensitive permissions.
Tab Limit has earned a fairly good reputation and likely can be trusted.