I guess XUL is the stumbling block for me there. And of course, the browser itself can be modified, for which yay! but really I'm looking for a small set of pri

I guess XUL is the stumbling block for me there. And of course, the browser itself can be modified, for which yay! but really I'm looking for a small set of primitives exposed in a high-level language that can be combined to create web browsers specific to certain tasks; perhaps something like this could be retrofitted onto Firefox, in the way that Emacs was an macro-extension of an existing editor.