Refactor the whole configuration

Reviewed-on: #1

modules/nixos/multimedia/web/firefox/policies.nix

@@ -0,0 +1,72 @@
+{
+  EnableTrackingProtection = {
+    Value = true;
+    Cryptomining = true;
+    Fingerprinting = true;
+    EmailTracking = true;
+    Level = "strict";
+  };
+
+  DisableTelemetry = true;
+  DisablePocket = true;
+  DisableFirefoxStudies = true;
+  DisableFirefoxAccounts = false;
+  DisableAccounts = false;
+  DontCheckDefaultBrowser = true;
+  OverrideFirstRunPage = "";
+  OverridePostUpdatePage = "";
+  NoDefaultBookmarks = true;
+  Cookies = {
+    Behaviour = "reject-foreign";
+    BehaviourPrivateBrowsing = "reject-foreign";
+  };
+
+  UserMessaging = {
+    WhatsNew = false;
+    ExtensionRecommendations = false;
+    FeatureRecommendations = false;
+    UrlbarInterventions = false;
+    UrlbarTopSitesEnabled = false;
+    SkipOnboarding = true;
+    MoreFromMozilla = false;
+  };
+
+  FirefoxHome = {
+    Search = false;
+    TopSites = false;
+    SponsoredTopSites = false;
+    Highlights = false;
+    Pocket = false;
+    SponsoredPocket = false;
+    Snippets = false;
+    Locked = true;
+  };
+
+  SearchSuggestEnabled = false;
+  NewTabPage = false;
+
+  SearchEngines = { # ESR only
+    Default = "Kagi";
+    PreventInstalls = true;
+    DisableSearchEngineUpdate = true;
+    Remove = ["Google" "Bing" "Amazon.com" "DuckDuckGo"
+              "eBay" "Twitter" "Wikipedia (en)"];
+    Add = [
+      {
+        Name = "Kagi";
+        URLTemplate = "https://kagi.com/search?q={searchTerms}";
+        Method = "GET";
+        IconURL = "https://kagi.com/favicon.ico";
+        Alias = "@k";
+        Default = true;
+      }
+    ];
+  };
+
+  FirefoxSuggest = {
+    WebSuggestions = false;
+    SponsoredSuggestions = false;
+    ImproveSuggest = false;
+    Locked = true;
+  };
+}