Why Vivaldi browser thinks Google’s new proposal, the Web-Environment-Integrity spec, is a major threat to the open web and should be pushed back.

Will accessibility tools that rely on automating input to the browser cause it to become untrusted? Will it affect extensions? The spec does currently specify a carveout for browser modifications and extensions, but those can make automating interactions with a website trivial. So, either the spec is useless or restrictions will eventually be applied there too.