In this article I would tell you how to change site icon that appears in browser address bar, bookmarks, and on the SERF page. You can change icon image with your own.

Solutions:

• Change Drupal icon in site settings

• Add your icon to a folder with current site theme

• Replace system Drupal icon

Change Drupal icon in site settings

Open “Themes” page in your browser (admin/build/themes/settings)
At the bottom of the page, you will see “Icon settings” form where you can set a path to an icon as well as upload new icon.

Add your icon to a folder with current site theme

• Open a folder with current theme
  • /themes – standard themes
  • /sites/all/themes – additional themes
• Add or change icon image in a folder of the required theme /sites/all/themes/[theme name]/favicon.ico

Replace system Drupal icon

Changeg /misc/favicon.ico with the desired image.

Note:
When upgrading Drupal, you should exclude image file when copying. Otherwise your icon could be re-written. You can also create a backup with other name and recover the icon after you complete upgrading Drupal.

Note:
Browser could show old icon due to cache settings. Please clear you cache to view the new icon.