One simple way to improve the user experience with web applications is to add a favicon. People are visual and they quickly recognize an image when they are looking through their bookmarked websites. Favicons also help with the tabbed browsing experience because the user can visually identify tabs with recognizable icons.
For Reporting Services 2008 R2, if you place a favicon.ico file in the root of your ReportManager installation that icon will be displayed when the user bookmarks the report site and in the browser’s tabs. Your SSRS installation is probably in a different directory but the default file location is:
%ProgramFiles%\Microsoft SQL Server\MSRS10_50.MSSQLSERVER\Reporting Services\ReportManager