JoinTabs is a free Chrome add-on developed by rodrigo.siqueira that allows users to combine all Chrome tabs in separate windows into a single window. With a simple click of the magnet icon in your browser, you can join all of your tabs, as well as any opened windows and popups, into a single main browser window.

This add-on is perfect for users who find themselves with multiple Chrome windows open and want to streamline their browsing experience. By consolidating all tabs into one window, users can easily switch between tabs without the hassle of managing multiple windows.

JoinTabs version 1.4 is the updated version of the add-on, and it is completely free with no ads or banners. However, it is important to note that some computers may experience the "grey screen" issue, which is a known Chrome bug related to the Merge Tabs function. More information about this bug can be found on the Chromium issue tracker.

Overall, JoinTabs is a convenient and useful add-on for Chrome users who want to combine their tabs into a single window for a more organized browsing experience.