We want to ship 64-bit Firefox on Windows. I want to verify that here are no places where sizeof(long) >= sizeof(size_t) in NSS. Part of this might include ensuring NSS builds on VS2010 without triggering any of the 64-bit compatibility warnings.

I've been building 32bit Firefox on VS2010 for quite some time (Win7 x64 OS) and don't recall seeing any 64bit compatibility warnings. I can post a build log of the NSS part of the build here if that'll help you.

What is the status of this bug? We are creating a bunch of Windows 64-bit machines that will soon be showing up officially at tbpl.

AFAICT, no work has been done yet. I suspect that there will be changes needed because i vaguely recollect there are a few cases where sizeof(long) >= sizeof(size_t) is assumed, at least.

Martin, do we still need someone to review the NSS code for Win64 compat issues? We have had official Win64 builds since Firefox 43 (December 2015).

Hardly. If there are compat issues, we will deal with them as they arise. I've done some review of integer issues, but given that we've been using this for a while, better to deal with things on a case-by-case basis.