When you open a webpage, your computer sends a request to the server where that page is stored. The server then responds with the page’s contents. When you visit a website that uses the Canvas Fingerprinting script, your browser adds a unique identifier to the request it sends
This identifier is based on the configuration of your browser and your system. It can include information such as your timezone, the plugins you have installed, and your screen resolution
The website can then use this identifier to track you. Canvas Fingerprinting is a relatively new technique, and it’s hard to say how widespread it is. However, it’s likely that a growing number of websites are using it, because it’s an easy way to track users without cookies or other identifiers. If you’re concerned about being tracked by Canvas Fingerprinting, there are a few things you can do
Finally, you can use a browser that blocks Canvas Fingerprinting by default, such as Firefox with the Privacy Badger addon.