Firefox launcher option %u cause of "Starting Firefox Web Browser" button?

[Dan Ciarniello]

Allen Halsey wrote:
> When I launch Firefox from the Applications Menu, there always appears a 2nd
> button on the Window List bar saying "Starting Firefox Web Browser". It
> stays there for about 15 seconds. And the mouse pointer is busy during this
> time.
> 
> This gives me the impression that Firefox starts very slow on Fedora. (F9
> and F10).
> 
> Just now I discovered that if create a new launcher and remove the %u option
> from the command, Firefox starts up immediately!
> 
> Why is the %u launcher option causing this poor user experience?
> 
> Allen
> 
This is just a guess since I am not sitting at my F10 box but does the 
new launcher option have "launch feedback" enabled?  Does the old one? 
I believe that it's an option when you create the new launcher.

Dan.