Comment by ground_cat

Yes. It is intended for users who are using Chromium-based browsers or others that still will support WEI. While you're right that if you're against WEI, you are more likely to opt for a browser that doesn't support it, not everyone may have that option or preference. As far as I know, no site has implemented this crap yet. So, while we believe the script would be effective based on WEI explainer docs, its real-world effectiveness is currently uncertain until we see actual implementations of WEI in use.