[codezero]

I think that for most purposes 32 bit had worked without much issue so it's a matter of cost vs benefit. Can you think of any issues that people face because Chrome was 32 bit? So far I'm seeing Java 8 integration, which is probably a tiny fraction of their users. Also it's not really breaking since those users can just use Firefox for that purpose. They obviously don't consider this a loss.

[comex]

Security is a big one. 64-bit address spaces are inherently harder to exploit, plus, IIRC, on OS X in particular, ASLR in 32-bit processes has some weaknesses that were never fixed.

[codezero]

Good point! To stay on my angle, are there Chrome specific security bugs that are in the most recent builds that are exacerbated by 32bit builds?

[cozzyd]

This is true for almost any application (very few things NEED 64 bits).