Do you have a good way to modify contenteditable divs from the extension? I'm working on one and we're having a hell of a time trying to come up with One Way to do input updates but everyone's contenteditables behave slightly differently.

Like I just want to be able to ask

* what is the content of this input field

* what is the selected text in the field

* please replace the content of the field with this new content

but the API there is really rough and there's tons of edge cases. Is there some library you use?