For now, as has been pointed out, the answer is uzbl. (Almost exactly what you describe is my current dream project, pieces designed, pieces roughed out, no pa

For now, as has been pointed out, the answer is uzbl. (Almost exactly what you describe is my current dream project, pieces designed, pieces roughed out, no part even remotely finished. The one I will get back to working on as soon as my startup exits and I have money and time. Or when it fails and I have time. You are not alone in wanting this.)