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

[Marcelo Magno T. Sales]

Em Dom 30 Nov 2008, Allen Halsey escreveu:
> 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?

Not at all. Firefox is always slow to start, no matter what command line 
options you specify :) One thing you can do to speed up a little its 
start up is to disable all the language packs you don't use.
Are you using KDE or Gnome? If you use KDE, the second button you see in 
the task bar is configurable. Open System Configuration and click 
Desktop and then Launch Notification or something like that. There's a 
check box "Enable notifications in task bar". Uncheck it and see if you 
get rid of the extra button. If nothing changes, go back to that screen 
and set the time limit below the checkbox to 0 seconds (there was a bug 
in this configuration option which prevented us from keeping this 
checkbox unchecked, don't know if it has already been fixed).

[]'s
Marcelo