How do I add a favicon for my wiki?
Version 1.4 by Vincent Massol on 2013/11/30
First, go to the presentation section of the administration page.
Add the following lines in the HTTP Meta Information:
<link rel="icon" href="$xwiki.getSkinFile("favicon.ico")" type="image/x-icon"/>
<link rel="shortcut icon" href="$xwiki.getSkinFile("favicon.ico")" type="image/x-icon"/>
<link rel="shortcut icon" href="$xwiki.getSkinFile("favicon.ico")" type="image/x-icon"/>
Then, visit the XWiki.DefaultSkin page and attach a favicon.ico file.
Finally, the most important, refresh your browser cache.