I've decided to volunteer my time, and this is the type of thing that I consider..how fast will it be...we don't have to guess how fast it will be, because Mozilla has already been ported to NetBSD/m68k (including the 1.4 release, unstable) and earlier versions of Moz to linux/m68k.
and yes, they are dog slow, but I will test it out, see exactly how slow, and whether or not 060 is enough horsepower..or whether it will only run acceptably on PowerPC or Amithlon. Actually, some people suggest, that earlier versions of mozilla were fast enough on an 040....after the .8 release but before the 1.4 release....that timeframe.
I still think 68k has to be the target, even if it won't run on any real 68k...for the reasons you mentioned, I am not going to buy an AmigaOne just to help with this project,a nd I don't think a lot of people own AmigaOne's...(yet)
so...I don't speak for the team of course, but just to let you know, one member of the team is considering these types of things. I expect that Mozilla will run on an 060 at bearable speeds, and since I expect more people will soon be using their amiga's via WinUAE, AF, Amithlon, OS 4, or MorphOS, than on an actual classic amiga, it probably won't be such a big issue....
someday, at least, it won't be such a big issue....as for how long it will take...I personally think the traditional porting route would take a very long time...I am looking into something along the lines of Tenon's mach ten 68k...again, this is just me..independently looking at it.
but I think that if not one thing, than another solution will present itself.
btw, I actually used aweb and browsed the internet with an amiga for 15 minutes earlier today....hadn't done that in 5 years...I am safely back using IE now...WOW..it was fun and nostalgic, and terrible all at the same time.