That's sounds like a relevant setting, thanks.
However, I'm also concerned about the case where LR is simulating no browser cache at all, thus it needs to get a copy of the static content, however it still seems to be bypassing our proxy server's copy. As if it's actually sending request headers like
Pragma: no-cache
Cache-Control: no-cache
We do want to simulate situations where the browser has no cache at the start of a test, but we don't want to tell intermediate proxies not to use their cache either.
Does that make sense?
Also, does the setting you indicate only take effect for parts of the test where we have allowed browser cache? (That is, pages subsequent to the first page loaded.)