A few weeks ago I started encountering the following problem when I tried using Google Street View on my system:
When I drag the icon to a spot on the map, a small photo box pops up and a yellow “Loading . . .” box appears at the top of the window. When I release the mouse button, the small photo vanishes and nothing else happens; the application just sits there with the “Loading . . .” indicator displayed.
I searched for a fix. Turns out there’s a conflict between the Street Views application and the MediaWrap Add-on. If I disable the MediaWrap extension (click on the icon in the bottom right tray), Street View works again.
So if you’re a searcher encountering a similar problem, try that out and see if it works for you.