The Brave browser offers a “force paste” option that allows you to copy and paste into those annoying web forms that try to prevent you from copying and pasting (e.g. when they’re trying to force you to type out an email address or password).
These onpaste handlers make it harder to use password managers and email aliases, and generally make web forms more time consuming and frustrating.
I loved this feature on the Brave browser, and I’d love to see it on Firefox. I’ve attached a photo that shows what this looks like on Brave.