JavaScript in Web Browser

It would be nice to be able to run custom JavaScript inside the web browser , because while the autofill is great when it works, it’s not 100% perfect, and doesn’t work on some pages, the ability to run custom JS would alleviate these issues.

this would be very useful.

Right now there is no option to wait for the page to be completly loaded before executing the key sequence, with this, it could be done