Does Programmers Stack Exchange site support syntax-highlighting for C++?
The reason I ask is that the code in my question isn't highlighted in Firefox 8.
Yes it does.
However, unless you explicitly tell the highlighter which language it is by including:
<!-- language: lang-cpp -->
at the start of your code snippet, it uses the tags to decide which language the code is in.
So either retag the question or use the language hint.