End-to-end encryption in the browser
I appreciate the effort, but this is one of those cases in which there isn't much security added by encryption.If I assume the website owner is malicious (or subverted by powers that be), I cannot trust the JS code provided by the website.  Key disclosure is as trivial as one line hidden somewhere in megabytes of JS code delievered from the server.  Which makes "end-to-end" part nearly meaningless.