Overlay Clock is a free Chrome add-on developed by YS that displays a digital clock on any webpage. With a small semi-transparent patch placed at the corner of the screen, this add-on allows users to easily keep track of the time while browsing the internet.

One of the key features of Overlay Clock is its customization options. Users can configure the colors and opacity of the clock to match their preferences and make it blend seamlessly with the webpage. Additionally, the add-on offers a choice between a 12-hour or 24-hour clock format, allowing users to display the time in their preferred style.

Another useful feature of Overlay Clock is its ability to restrict the clock to fullscreen mode only. This makes it particularly useful when reading text on webpages, such as with the Kindle Cloud Reader. By having the clock only appear in fullscreen mode, it avoids any potential conflicts with the content on the webpage.

Overall, Overlay Clock is a simple yet practical add-on for Chrome that provides users with a convenient digital clock display on any webpage. Its customization options and fullscreen mode restriction make it a versatile tool for users who want to keep track of time while browsing the internet.