https://bugs.jqueryui.com/ticket/4033/
#4033 (Tab hrefs may be converted to full URLs in IE, then misinterpreted as ajax tabs) - jQuery UI...
Static archive of the old bugs.jqueryui.com Trac site.
https://raw.githubusercontent.com/mozilla-firefox/firefox/main/browser/base/content/test/favicons/file_invalid_href.html
Test file for bugs with invalid hrefs for favicons
test filebugsinvalidfavicons