One of the threats to privacy is canvas fingerprinting, a way of browser fingerprinting that was created and implemented mainly by AddThis, a web analytics company. However, it is not the only company using it to identify the web browser that you are using, in order to track you and target you with ads while you access different websites. Canvas printing is a script that asks your browser to draw a hidden image and it uses small variations in the way the image is drawn. With this, a unique ID code is generated and it can be used to keep track of you.
Apart from the default fake readout mode, it is possible to select the way in which CanvasBlocker deals with canvas requests by default. There are different options available. You can block everything, allow only on whitelist, ask for permission, block readout, ask for readout, block only on black list or allow everything. The option to allow canvas in PDFs stands out because like Firefox’s native PDF reader uses canvas to display PDF content. In order to confirm if CanvasBlocker, or any other method to block fingerprinting is working, you can go to the HTML5 Canvas FingerPrinting test page here: Browserleaks.com. You can download the CanvasBlocker Add-on for Firefox from this link: https://addons.mozilla.org/en-US/firefox/addon/canvasblocker/?src=cb-dl-updated and an option for Chrome is available here: https://chrome.google.com/webstore/detail/canvasfingerprintblock/ipmjngkmngdcdpmgmiebdmfbkcecdndc
Using CanvasBlocker is one of the measures that you can use to protect your privacy, but there are other tools that you need to include in your set of solutions to defend yourself from online threats. A VPN is one of the tools that deserves to be included in your daily package of protection to enjoy a safe browsing experience. VPN services applies encryption to your internet connection, so others won’t see what you are doing online. Your activities and conversations are protected and will remain private and it also gives you online freedom as it lets you bypass blocks and restrictions so that you can enjoy more content.