Dark Mode is a free and open-source Chrome extension developed by Agile Upwork. As the name suggests, it provides a dark mode implementation for websites and PDF documents. With just a click, users can enable dark mode and switch it off as needed. The extension retains your choice across all websites where it is activated.

One of the highlights of Dark Mode is its simplicity. It is based on a single CSS attribute called "mix-blend-mode", making it lightweight and easy to use. The extension works well with almost any website or PDF document, providing a dark background that is easy on the eyes.

However, it's worth noting that images may appear like negatives due to color inversion. Despite this minor drawback, Dark Mode offers a convenient solution for those who prefer a darker interface while browsing the web.

Overall, Dark Mode is a straightforward and user-friendly Chrome extension that fulfills its purpose effectively. Its open-source nature also encourages users to contribute and improve its functionality.