Hi,

I use ratpoison as window manager, which has its own idea of window
placement and sizing. When I start iceweasel and select "restore previous
session", iceweasel also restores the window size, but is subsequently
corrected by the window manager, however the window contents do not follow.

To reproduce:

 - use a tiling window manager, such as ratpoison
 - start full-screen iceweasel, open web page
 - close iceweasel
 - define smaller region for iceweasel
 - reopen iceweasel
 - select "restore previous session"

   Simon