Native 68k Netsurf

[Fab]

it is easier add CCS and good JAVASCRIPT to ibrowse or Aweb
even there is the full aweb source code
I'm sure anyone with good skills can do it and make them run on a standart A1200 /020 +8mb ram/AGA only
the problem is the hard work..nobody will make it for free

No, believe me, it's much easier to build a full browser around a proven web engine like WebKit (or Netsurf) than implementing yourself full CSS and Javascript and stuff it into AWeb/Ibrowse/Whatever.

Now, about making it run on a 1200/020 and 8MB, it's a whole different story.

[Fab]

So now some users have done speed compare between OS4 and 68k netswurf.this show that ixemul and SDL is no speedbrake and 68k netsurf is 3-5* faster if use a CPU with same clockspeed(see the virtual 100 MHZ time)

Seriously, your calculation is totally wrong...

Benchmarking a distant site is already very wrong if not done on the same machine/network, but your assumption that loading times are exactly inversely proportional to CPU clock is absolutely insane.
Sure, some time will be spent in building, rendering and blitting the page, but that's only a fraction of the process.