firefox: remove patchelf usage

Firefox has a number of optional dependencies that get dlopened.
Instead of using patchelf to set the RPATH use LD_LIBRARY_PATH.
The motivation for this is we already set LD_LIBRARY_PATH in the
wrapper on Linux.

pkgs/applications/networking/browsers/firefox/wrapper.nix

@@ -3,9 +3,9 @@
 
 ## various stuff that can be plugged in
 , flashplayer, hal-flash
-, ffmpeg, xorg, alsaLib, libpulseaudio, libcanberra-gtk2, libglvnd
+, ffmpeg, xorg, alsaLib, libpulseaudio, libcanberra-gtk2, libglvnd, libnotify
 , gnome3/*.gnome-shell*/
-, browserpass, chrome-gnome-shell, uget-integrator, plasma5, bukubrow
+, browserpass, chrome-gnome-shell, uget-integrator, plasma5, bukubrow, pipewire
 , tridactyl-native
 , fx_cast_bridge
 , udev
@@ -51,6 +51,7 @@ let
       ffmpegSupport = browser.ffmpegSupport or false;
       gssSupport = browser.gssSupport or false;
       alsaSupport = browser.alsaSupport or false;
+      pipewireSupport = browser.pipewireSupport or false;
 
       plugins =
         let
@@ -80,7 +81,8 @@ let
           ++ lib.optional (cfg.enableFXCastBridge or false) fx_cast_bridge
           ++ extraNativeMessagingHosts
         );
-      libs =   lib.optionals stdenv.isLinux [ udev libva mesa ]
+      libs =   lib.optionals stdenv.isLinux [ udev libva mesa libnotify xorg.libXScrnSaver ]
+            ++ lib.optional (pipewireSupport && lib.versionAtLeast version "83") pipewire
             ++ lib.optional ffmpegSupport ffmpeg
             ++ lib.optional gssSupport kerberos
             ++ lib.optional useGlvnd libglvnd