Pc, Internet Explorer, running Vista (I know, I know!)
I’ll try rebooting...
On Internet Explorer go to Tools>Internet Options and then clear your cookies, history, and delete files including offline files. That’ll do it.
If that didn’t fix it, you might try right clicking on your bookmark for FR and choosing ‘properties’. From there, you should be able to check which icon has been set to be used for that bookmark.
If that doesn’t work or you can’t find the icon screen, you’d probably be well served by running some spyware/adware scanner software.