3 Tabs Only is a free Chrome extension developed by One Who Tinkers. As the name suggests, this extension allows you to have a maximum of three open tabs in your browser.

With 3 Tabs Only, you can work with more focus and avoid the distractions that come with having numerous tabs open. If you try to open a fourth tab, the extension automatically closes the fourth tab and notifies you with a pop-up. Simply press Enter to close the pop-up and continue working.

This extension is perfect for those who want to stay organized and productive. By limiting the number of open tabs, it forces you to finish tasks before starting new ones.

I have personally used 3 Tabs Only for years and it has greatly improved my productivity. It is currently installed in my browser and I highly recommend it to anyone who wants to maximize their efficiency.

Please note that this extension is only available for Chrome users.