Editing Xmonad/Frequently asked questions (section)

=== Watch fullscreen flash video ===
Since approximately November 2010, the stock configuration no longer causes flash windows to immediately disappear. However, tiling flash's windows is often not what you want. Try some or all of the following hooks.

For browser plugins and most apps, including mplayer floated by manage hook (as in the default manageHook) the following setup allows normal toggling of fullscreen. A few mplayer versions are configured to use a different fullscreen method, but they can be made to work with the isFullscreen hook by adding a line <code>fstype=none</code> to ~/.mplayer/config, or using the <code>-fstype=none</code> flag from the command line. See also the end of the faq regarding using handleEventHook instead.

Add one of the following manageHooks, and modify layoutHook with smartBorders:
<haskell>
-- other imports
import qualified XMonad.StackSet as W
import XMonad.Hooks.ManageHelpers
import XMonad.Layout.NoBorders

main = xmonad defaultConfig {
    -- skipped
    , layoutHook = smartBorders (yourExistingLayoutHook) -- Don't put borders on fullFloatWindows
    , manageHook =  myManageHooks
    }

myManageHooks = composeAll
-- Allows focusing other monitors without killing the fullscreen
--  [ isFullscreen --> (doF W.focusDown <+> doFullFloat)

-- Single monitor setups, or if the previous hook doesn't work
    [ isFullscreen --> doFullFloat
    -- skipped
    ]
</haskell>
If you have multi-head and the focusDown hook doesn't work for you, in darcs xmonad/xmonad-contrib (greater than 0.9.1) XMonad.Hooks.EwmhDesktops has a fullscreenEventHook that is also worth a try. Add it to any existing handleEventHook with <+>, or simply use it as your handleEventHook if you don't already have one. This also is useful for people who prefer tiling mplayer when not fullscreened, or use totem, vlc, or other players that require something like fullscreenEventHook to work at all.