Favicons and Images
Checking every page of your website is vital when you first go live. One thing to look for is images, and this is another good reason for cross-browser checks, as missing images appear in different ways depending on your browser. For instance, Firefox will ignore the missing picture or icon, whereas Internet Explorer will display a red “X" where the image should be found.
If you are using a database-driven solution where images are handled in the database, then you can expect these to continue working as long as there are no problems.
Something else image-related that you should make sure you have early on is the favorites icon, or favicon. This is a small icon that appears next to your website in a readers list of bookmarks, as well as in the address bar and on browser tabs. They should be in .ico format for the best results across all browsers, and can originate as GIF, JPEG, PNG or SVG files.
A favicon saved in the website’s root directory is added as follows:
<link rel="icon" type="image/x-icon" href="/favicon.ico" />