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Thanks! That gives me something to research.

Now that I look, I should have caching set to expire on the date I update the site’s pages, to make sure user’s are getting the updates. So it’s for more than favicons.

Then looking up what to put in, is confusing as anything.

I wish and don’t remotely understand why posters of tech blogs on the internet do not date their writings.

So at this point, I am very unclear what the current working code is to add into the files, to force non-caching is. I need to do much more research, it looks like. Unless somewhere here knows?

You’ve given me a great starting point — a clue what text I needed to search for to get somewhere!

So far I’ve found: from May 2013
Case study:
lots of ideas: