Forum user Wayne writes;
"I commented about the Purism Forum site in a task, which voiced a similar concern about DuckDuckGo. At the time, I used the CanvasBlocker add-on with Firefox, and, if memory serves, the Purism Forum site got the same DOMRect API indications. (It has been a while; there could be new issues.)"
If we were to review our own web resources, i.e. forum, store, blog, tracker, etc., in a browser that supported a sufficiently strong privacy and security posture, we might find issues with our internet presence before users do and mitigate them and thereby reassure them that we take privacy and security as seriously as they do.