Stop tracking via Canvas Fingerprinting …

Add-on	CanvasBlocker
Type	anti tracking
Difficulty	medium
Licence	MPL v2.0
Configuration	Set “Block mode” to “block readout API”.

The canvas fingerprint of your browser results from your operation system and configuration like installed fonts. It works by exploiting the HTML5 canvas element. When a user visits a website with canvas fingerprinting, their browser is instructed to draw a hidden line of text or 3D graphic that is then converted to a digital token. Little variations in the rendering of the installed graphic drivers and used GPU can be used for the tracking.

Please visit https://browserleaks.com/canvas before you install the add-on.

You can see my setup below, which is analysed from the canvas fingerprint of my browser:
Linux / Fedora / Firefox

Canvas fingerprint with browser and OS information …

Even if I use a user agent switcher, it won’t change anything.

After installing CanvasBlocker you will have a random canvas fingerprint with the default configuration. This isn’t good for your privacy, because an individual unique canvas fingerprint will be like a red light in the log files.

Set the configuration to block readout API. This is the best configuration for your privacy, because you can’t leave a canvas fingerprint. The server log can’t see if you are using no JavaScipt, a text browser or the CanvasBlocker. You can deactivate the checkbox for show messages, too.

configuration Canvas add-on – block readout API …

This browser is configured correct and don’t have a canvas fingerprint.

Canvas fingerprint disabled for privacy …

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I made a liste of some add-ons to increase your security / privacy online: click here for the list!

I will introduce each add-on with an article in my blog and explain how to use it. If you’r missing an important add-on please leave a comment.