2024-06-12
🔗Learning
Hit an unusual problem today where reading pixels back from a canvas HTML element won't always give you the same value you wrote, if Brave's anti-fingerprinting measures are on. (Anti-aliasing is an issue too, but we knew about that already.) I remember reading something about how browser-fingerprinting libraries can sometimes use techniques like this to determine unique users, but was baffled for a while until turning off Brave's privacy features made the bug go away.