feat(firefox): add settings

home/browsers/firefox.nix

@@ -1,7 +1,42 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 
+with lib;
 let
   firefox-addons = pkgs.nur.repos.rycee.firefox-addons;
+
+  prefer-dark-theme = config.gtk.gtk3.extraConfig.gtk-application-prefer-dark-theme;
+
+  sharedSettings = {
+    # Privacy recommendations from https://www.privacytools.io/browsers/#about_config
+    "privacy.firstparty.isolate" = true;
+    "privacy.resistFingerprinting" = true;
+    "privacy.trackingprotection.fingerprinting.enabled" = true;
+    "privacy.trackingprotection.cryptomining.enabled" = true;
+    "privacy.trackingprotection.socialtracking.enabled" = true;
+    "privacy.trackingprotection.enabled" = true;
+    "browser.send_pings" = false;
+    "browser.urlbar.speculativeConnect.enabled" = false;
+    "dom.event.clipboardevents.enabled" = false;
+    "media.eme.enabled" = false;
+    "media.gmp-widevinecdm.enabled" = false;
+    "media.navigator.enabled" = false;
+    "network.cookie.cookieBehavior" = 1;
+    "network.http.referer.XOriginPolicy" = 2;
+    "network.http.referer.XOriginTrimmingPolicy" = 2;
+    "webgl.disabled" = true;
+    "browser.sessionstore.privacy_level" = 2;
+    "network.IDN_show_punycode" = true;
+
+    # Theme
+    "extensions.activeThemeID" = concatStrings
+      [ "firefox-compact-"
+        (if prefer-dark-theme then "dark" else "light")
+        "@mozilla.org"
+      ];
+    "devtools.theme" = if prefer-dark-theme
+      then "dark"
+      else "light";
+  };
 in
 {
   programs.firefox = {
@@ -14,9 +49,11 @@ in
     profiles = {
       private = {
         id = 0;
+        settings = sharedSettings;
       };
       work = {
         id = 1;
+        settings = sharedSettings;
       };
     };
     extensions = with firefox-addons; [