In the iceweasel_3.5.16-13_i386.deb package, from Debian 6 Squeeze (which is
not the current version of Iceweasel in Squeeze stable) I noted that there was
an error in the file usr/share/applications/iceweasel.desktop.
The line :
StartupWMClass=Firefox-bin
is incorrect as far as I can determine.
Using the command 'xprop' in a small terminal window with Iceweasel open and
visible on screen in a window behind, and then left clicking the open Iceweasel
window reveals this result:
WM_CLASS(STRING) = "Navigator", "Iceweasel"The Free Desktop webpage on the
subject, Recognized desktop entry keys, says:
StartupWMClass
If specified, it is known that the application will map at least one
window with the given string as its WM class or WM name
hint (see the Startup Notification Protocol Specification for more details).
This would suggest the correct entry in the iceweasel.desktop file should be
changed to read in this case :
StartupWMClass=Iceweasel
More detail can be found at :
http://standards.freedesktop.org/startup-notification-spec/startup-notification-0.1.txt
(excerpts)
WMCLASS a string to match against the "resource name" or "resource class"
hints. If this key is present, the launchee will most likely not send a
"remove" message on its own. If the desktop environment detects a toplevel
window mapped with this name or class, it should send a "remove" message for
the startup sequence. Note that the class hint is in Latin-1, so the value of
this key must be converted to Latin-1 before strcmp'ing it with the window
class/name. (Though in all known cases only ASCII is involved so it doesn't
matter.)
- the launchee code is responsible for sending a "remove" message to end the
launch sequence, unless the WMCLASS key was set.
I think this could mean this bug in the iceweasel.desktop file is related to
and may well be the cause of bug #523824.
Although StartupWMClass is an optional entry for a desktop file, the omission
of a correct entry might lead to occasional problems when shutting down the
computer, as a warning message may appear about an unknown application still
running. This is apparently due to some process started by Mozilla Firefox /
Iceweasel that is not properly closed. It would appear from what I have read
that the StartupWMClass entry should allow the desktop to close any child
processes when the main window is closed and avoid this situation.
Yours sincerely,
Zebedee.
