I believe the textboxes don't provide more features than html input, most of the code in the textbox binding serves to forward attributes/events to the inner html input. The only thing I would be worried about would be the "Edit" context menu. It seems to be working automatically for HTML inputs when used in-content (even in XUL docs), I'm simply not sure whether it works in the top-level browser window, hence the suggestion to start only with the in-content ones.
For the top-level browser window, if the context menu turns out not to work, it should be possible to use a customized built-in HTML input like bug 1437641 is doing.
Priority: -- → P5
Summary: Consider converting in-content textboxes to input[type=text] → Consider converting textboxes to input[type=text]
You need to log in before you can comment on or make changes to this bug.