Use custom firefox shim to keep trash out of $HOME

README.org

@@ -481,6 +481,7 @@ nixos = nixpkgs.lib.nixosSystem {
     <<module-hugo>>
     <<module-flakes>>
     <<module-cachix>>
+    <<module-firefox>>
     <<module-home-manager>>
   ];
 };
@@ -795,12 +796,17 @@ in {
 
 #+BEGIN_SRC nix :noweb yes :tangle modules/firefox.nix
 # <<file-warning>>
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
-{
+let
+  myFirefox = pkgs.writeShellScriptBin "firefox" ''
+    HOME=~/.local/share/mozilla ${pkgs.firefox-bin}/bin/firefox
+  '';
+
+in {
   # NOTE: Use the binary until module is developed.
   environment.systemPackages = [
-    pkgs.firefox-bin 
+    myFirefox
   ];
 }
 #+END_SRC

flake.nix

@@ -25,6 +25,7 @@
           ./modules/hugo.nix
           ./modules/flakes.nix
           ./modules/cachix.nix
+          ./modules/firefox.nix
           inputs.home-manager.nixosModules.home-manager {
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;

modules/firefox.nix

@@ -1,9 +1,14 @@
 # This file is controlled by /etc/dotfiles/README.org
-{ pkgs, ... }:
+{ config, pkgs, ... }:
 
-{
+let
+  myFirefox = pkgs.writeShellScriptBin "firefox" ''
+    HOME=~/.local/share/mozilla ${pkgs.firefox-bin}/bin/firefox
+  '';
+
+in {
   # NOTE: Use the binary until module is developed.
   environment.systemPackages = [
-    pkgs.firefox-bin 
+    myFirefox
   ];
 }