The Color Management plugin seems to work quite nicely – basically there’s an enable/disable button, and a place to choose your monitor profile, or you can just leave it blank like I did and it will use the system’s monitor profile.
The author has released a new version 0.4 with some minor changes, which is available on both the addons.mozilla.org site and his own (the latter requires no registration to download the plugin).
Considering how many people use the web for viewing photos these days, it’s amazing ALL browsers aren’t colour-managed.

Cheers,

Ben

Thanks for the link – and a strong piece in support of long-overdue color management. I’ll try the plug-in, too. And can you believe IE is still color-naive? I guess I *can* believe it.