Hi! Thanks for the review.
Actually since the release 3.14 the addon (if you enable it) can insert directly in the textbox. Although, this doesnt' work in all websites due themselves (for example, Facebook Messenger doesn't use common "TextBox" (input or textarea), but they use a "special container"). I'm looking for a way to enable on those websites, but currectly it's not supported there. Sorry
I remain at your disposal at firstname.lastname@example.org or on GitHub 😀