firefox: fix darwin wrapper

- add execdir passthru
  usually this is /bin on macOS it is different.

pkgs/applications/networking/browsers/firefox-bin/default.nix

@@ -174,6 +174,7 @@ stdenv.mkDerivation {
       gappsWrapperArgs+=(--argv0 "$out/bin/.firefox-wrapped")
     '';
 
+  passthru.execdir = "/bin";
   passthru.ffmpegSupport = true;
   passthru.gssSupport = true;
   # update with:

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

@@ -263,7 +263,7 @@ stdenv.mkDerivation (rec {
 
   installPhase = if stdenv.isDarwin then ''
     mkdir -p $out/Applications
-    cp -RL Firefox.app $out/Applications
+    cp -LR dist/Firefox.app $out/Applications
   '' else null;
 
   postInstall = lib.optionalString stdenv.isLinux ''

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

@@ -101,7 +101,11 @@ let
       nativeBuildInputs = [ makeWrapper lndir ];
       buildInputs = lib.optional (browser ? gtk3) browser.gtk3;
 
-      buildCommand = ''
+      buildCommand = lib.optionalString stdenv.isDarwin ''
+        mkdir -p $out/Applications
+        cp -R --no-preserve=mode,ownership ${browser}/Applications/${browserName}.app $out/Applications
+        rm -f $out${browser.execdir}/${browserName}
+      '' + ''
         if [ ! -x "${browser}${browser.execdir}/${browserName}" ]
         then
             echo "cannot find executable file \`${browser}${browser.execdir}/${browserName}'"

pkgs/applications/networking/browsers/tor-browser-bundle/default.nix

@@ -337,6 +337,7 @@ stdenv.mkDerivation rec {
     $out/bin/tor-browser -version >/dev/null
   '';
 
+  passthru.execdir = "/bin";
   meta = with stdenv.lib; {
     description = "An unofficial version of the tor browser bundle, built from source";
     homepage = https://torproject.org/;