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Why doesn't firefox obey rel="icon" and instead assumes that /favicon.ico exists?

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We have a page where we just added <link rel="icon" type="image/ico" href="/other-path/favicon.ico"/> to the header, but while Firefox reads that link and includes the information in the page (can see in "View Page Info" -> Media), the .ico file specified is overridden by Firefox assuming that <page-path>/favicon.ico is where it should find the favicon. Is this the expected behavior? Every other browser follows this pattern, but Firefox does not (since at least Firefox 39 when I did some testing). Should I write this up in bugzilla?

We have a page where we just added <link rel="icon" type="image/ico" href="/other-path/favicon.ico"/> to the header, but while Firefox reads that link and includes the information in the page (can see in "View Page Info" -> Media), the .ico file specified is overridden by Firefox assuming that <page-path>/favicon.ico is where it should find the favicon. Is this the expected behavior? Every other browser follows this pattern, but Firefox does not (since at least Firefox 39 when I did some testing). Should I write this up in bugzilla?

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Rick said

Should I write this up in bugzilla?

Hi Rick, it's worth taking a look in Bugzilla to see whether it has been filed. Sometimes the search done when you start submitting a new bug is more accurate than the regular search box.

If you have a link to a page demonstrating this problem, that might also help.