with regards to browser, microb patches didn't apply cleanly to FF7/8 (can't remember what i looked into). the changes required were not that bad, some line numbers were a bit off, extra nested if statement, renamed variables. a bit of searching and they could mostly be worked out. some are just patches for branding, others added hildon message boxes, tuning etc. alopex may have already done most of this for a more recent version of engine.

browserd and/or some other components already have replacements. UI is still closed AFAIK so bug fixes there would require a replacement, but as a stop gap it could just be used as is for now, as long as it works with recent api.