# CanvasBlocker privacy rating

Firefox extension that blocks or fakes the output of canvas and other JavaScript APIs that websites use for browser fingerprinting.

## Summary

CanvasBlocker scores 80 out of 100 (grade B) on the browser extensions criteria. It meets 3 of 4 criteria: open source, no trackers or telemetry and no ads or data sales. It does not meet independent audit.

- Website: https://github.com/kkapsner/CanvasBlocker
- Source code: https://github.com/kkapsner/CanvasBlocker
- License: MPL-2.0
- Category: [Browser extensions](https://privacyratings.com/browser-extensions/)
- Grade: B (80/100)

## Criteria

| Criterion | Answer | Note | Evidence |
| --- | --- | --- | --- |
| Open source | Yes | MPL-2.0. | https://github.com/kkapsner/CanvasBlocker/blob/master/LICENSE.txt |
| No trackers or telemetry | Yes | The extension does not collect any data. | https://addons.mozilla.org/en-US/firefox/addon/canvasblocker/privacy/ |
| No ads or data sales | Yes | Free open-source extension with no ads. | https://github.com/kkapsner/CanvasBlocker |
| Independent audit | No | No independent audit is published. |  |

Source: https://privacyratings.com/browser-extensions/canvasblocker/
Edit: https://github.com/privacyratings/privacyratings.com/edit/main/ratings/browser-extensions/canvasblocker.md