How to Change Favicon.ico in SharePoint 2013
First we have to upload image in this link : http://tools.dynamicdrive.com/favicon/ Note: it's supports gif, jpg, png, and bmp extensions. Next step we have to open SharePoint Site(Like http://abc ). Go to site setting--> Site asserts--> Click on New Document and Upload Converted favicon.ico and Save it. Finally we have to Open SharePoint Designer. Open site (type http://abc). Once Open it go to Master pages---> take a copy of v4.master and Open it. Search <SharePoint:SPShortcutIcon and Replace with this tag <SharePoint:SPShortcutIcon runar="Server" IconUrl="http://abc/siteasserts/favicon.ico"/> Check your site. If not updated Clear cache.