auscompgeek: It's a Greek news in English site online, I can't yell at them. Is my assumption wrt page expiry time affecting icon cache expiry time reasonable?
Because it does make sense and I can't see a problem with that right now. There is no standard for setting separate expiry times for icons in a page.
Interesting, this is also a way to keep track of former visitors eh. Tag icons with a tag, and simply watch server logs for icon reloads.
The reloads would occur even if the user would meanwhile no longer be in private/anonymous surf mode. NOT GOOD.
Firefox privacy enhancement feature proposal: Tag all cached and bookamrked objects acquired or updated (!) in private browsing mode so they pop up a warning if one attempts to use them in non private mode later, and block all icon reloads of such while in non private mode while at it.
Also it seems all news sites are affected, which is logical, they all have short page expiry time settings.