To the best of my knowledge, DOM and JavaScript does not allow for a secure implementation of end-to-end encryption in a browser, especially if you want the dec

To the best of my knowledge, DOM and JavaScript does not allow for a secure implementation of end-to-end encryption in a browser, especially if you want the decrypted text to populate the DOM. You'd be leaving your data open to XSS attacks, browser extensions and the service provider changing their code. For this reason, I think it would be better if you started advocating for specific changes to the HTML standard.