This add-on allows users to prevent websites from using the Javascript <canvas> API to fingerprint them. Users can choose to block the <canvas> API entirely on some or all websites (which may break some websites) or just block or fake its fingerprinting-friendly readout API. More information on <canvas> fingerprinting can be found at http://www.browserleaks.com/canvas. The different block modes are: At present, only my domain (kkapsner.de) is whitelisted by default. Please report issues and feature requests at https://github.com/kkapsner/CanvasBlocker/issues A highly experimental version for Android is available at https://github.com/kkapsner/CanvasBlocker/tree/android