Ok finally

modules/librewolf.nix

@@ -1,12 +1,14 @@
 { pkgs, ... }:
 
 let
-  policiesJson = builtins.toJSON {
+  policies = {
     policies = {
       DisableTelemetry = true;
       DisableFirefoxStudies = true;
       DisablePocket = true;
       DisableFirefoxAccounts = true;
+      OfferToSaveLogins = false;
+      DisableSafeBrowsing = true;
 
       FirefoxHome = {
         Search = true;
@@ -39,71 +41,34 @@ let
           install_url = "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi";
           installation_mode = "force_installed";
         };
-        "{15cb5e64-94bd-41aa-91cf-751bb1a84972}" = {
-          install_url = "https://addons.mozilla.org/firefox/downloads/latest/catppuccin-macchiato-lavender2/latest.xpi";
-          installation_mode = "force_installed";
-        };
       };
 
       Preferences = {
-        "browser.startup.homepage" = {
+        "browser.startup.homepage" = "about:home";
-          Value = "about:home";
+        "extensions.autoDisableScopes" = 0;
-          Status = "locked";
+        "browser.toolbars.bookmarks.visibility" = "always";
-        };
+        "network.cookie.cookieBehavior" = 1;
-        "extensions.autoDisableScopes" = {
+        "extensions.activeThemeID" = "firefox-alpenglow@mozilla.org";
-          Value = 0;
+        "privacy.resistFingerprinting" = true;
-          Status = "locked";
+        "browser.ml.chat.enabled" = false;
-        };
+        "browser.ml.chat.sidebar" = false;
-        "browser.toolbars.bookmarks.visibility" = {
+        "browser.tabs.groups.smart.userEnabled" = false;
-          Value = "always";
-          Status = "locked";
-        };
-        "network.cookie.cookieBehavior" = {
-          Value = 1;
-          Status = "locked";
-        };
-        "privacy.clearOnShutdown.cookies" = {
-          Value = false;
-          Status = "locked";
-        };
-        "privacy.clearOnShutdown.history" = {
-          Value = false;
-          Status = "locked";
-        };
-        "sidebar.revamp" = {
-          Value = true;
-          Status = "locked";
-        };
-        "sidebar.verticalTabs" = {
-          Value = true;
-          Status = "locked";
-        };
-        "sidebar.main.tools" = {
-          Value = "bookmarks,history,tabs";
-          Status = "locked";
-        };
-        "sidebar.visibility" = {
-          Value = "always";
-          Status = "locked";
-        };
-        "extensions.activeThemeID" = {
-          Value = "{1d573fb2-437c-4440-9b7b-b72a3eaec105}";
-          Status = "locked";
-        };
       };
     };
   };
 
-  policiesFile = pkgs.writeText "librewolf-policies.json" policiesJson;
+  policiesFile = pkgs.writeText "librewolf-policies.json" (builtins.toJSON policies);
 in
 {
   system.activationScripts.postActivation.text = ''
-    DIST_DIR="/Applications/LibreWolf.app/Contents/Resources/distribution"
+    for APP_DIR in "/Applications/LibreWolf.app" "$HOME/Applications/LibreWolf.app"; do
-    if [ -d "/Applications/LibreWolf.app" ]; then
+      if [ -d "$APP_DIR" ]; then
+        DIST_DIR="$APP_DIR/Contents/Resources/distribution"
         mkdir -p "$DIST_DIR"
-      cp ${policiesFile} "$DIST_DIR/policies.json"
+        cp -f ${policiesFile} "$DIST_DIR/policies.json"
         chmod 644 "$DIST_DIR/policies.json"
-      echo "LibreWolf policies applied."
+        echo "Applied LibreWolf policies to $APP_DIR"
       fi
+    done
   '';
 }