Popupsta is a free Chrome add-on developed by singsai that allows you to open up any site in a new popup window. With this handy tool, you can turn your current browser window into a popup window, also known as a modal. By doing so, you can increase your browser window's screen real estate and have a more immersive browsing experience.

One of the main features of Popupsta is its ease of use. Simply click on the Popupsta icon and the current window will instantly transform into a popup window. The popup window is resizable, allowing you to customize its size according to your preferences. Additionally, you can easily mute the audio of the popup window by pressing the 'M' key. For those who prefer keyboard shortcuts, Alt/Option+P will also work as an alternative to clicking.

With Popupsta, you can enjoy a clutter-free browsing experience by opening websites in popup windows. Whether you want to watch a video while working on other tasks or simply want to have more screen space for your browsing activities, Popupsta is a convenient tool that helps you make the most out of your browser window.