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Answer 1

+5 A:

In theory, you can. In practice, browsers indeed cache it very agressively. Your best bet is to place the favicon file outside the root folder (to prevent automatic lookup) and manually define it in <head> along with a daily changing timestamp in the query string of the favicon URL. E.g.

<link rel="shortcut icon" type="image/x-icon" href="/images/favicon.ico?3213256">

Oh, the HTML page itself should also have less or more the same cache control settings, else the browser will request the page itself from the cache and thus never refresh the favicon.

BalusC 2010-08-27 15:54:36

Good idea, forcing a unique path is a good way to bust out of the cache problem +1

Konrad 2010-08-27 15:56:39

Hmm... that 3213256 seems longer than necessary. I bet I could get away with re-using 1-31.

Joel Coehoorn 2010-09-14 03:53:58

That was just an example :) It doesn't matter what you put in, as long as it changes daily.

BalusC 2010-09-14 11:12:12

Answer 2

A:

You should be able to control how the favicon is cached by setting the expires header. Alternatively, just change the URL to the favicon daily and set it using the link header.

<link href='http://yoursite.com/favicon-20100827.ico' rel='shortcut icon'/

Mr. Shiny and New 2010-08-27 15:54:56

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Can I change a favicon daily

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