system/modules/nixos/programs/browsers/policies.nix

{ withKeePassXcAddon ? false
, withPassffAddon ? false
, withRedirectorAddon ? false
, withSidebarTabsAddon ? false
, withAllSearchEngines ? false
, firefoxAddons ? { }
, lib
, writeText
, ...
}:

let
  firefoxAddonXpiPath = addon:
    "${addon}/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/${addon.addonId}.xpi";
in
# See: https://mozilla.github.io/policy-templates/
writeText "policies.json" (builtins.toJSON {
  policies = {
    OverrideFirstRunPage = "";
    OverridePostUpdatePage = "";
    DisableAppUpdate = true;
    DisableSystemAddonUpdate = true;
    DisableFirefoxStudies = true;
    DisableTelemetry = true;
    DisableFeedbackCommands = true;
    SearchBar = "unified";
    SearchSuggestEnabled = false;
    SearchEngines = {
      Add = [
        {
          Alias = "sx";
          Name = "SearXNG";
          Description = "SearXNG — a privacy-respecting, open metasearch engine";
          IconURL = "https://search.sapti.me/static/themes/simple/img/favicon.png";
          URLTemplate = "https://search.sapti.me/search?q={searchTerms}";
        }
      ] ++ lib.optionals withAllSearchEngines [
        {
          Alias = "np";
          Name = "NixOS Packages";
          Description = "Search NixOS packages by name or description.";
          IconURL = "https://nixos.org/favicon.png";
          URLTemplate = "https://search.nixos.org/packages?query={searchTerms}";
        }
        {
          Alias = "no";
          Name = "NixOS Options";
          Description = "Search NixOS options by name or description.";
          IconURL = "https://nixos.org/favicon.png";
          URLTemplate = "https://search.nixos.org/options?query={searchTerms}";
        }
        {
          Alias = "ng";
          Name = "Noogle";
          Description = "Search for nix functions by name.";
          IconURL = "https://noogle.dev/favicon.png";
          URLTemplate = "https://noogle.dev/q?term={searchTerms}";
        }
        {
          Alias = "hg";
          Name = "Hoogle";
          Description = ''
              Hoogle is a Haskell API search engine, which allows you to
            search many standard Haskell libraries by either function name,
            or by approximate type signature.'';
          URLTemplate = "https://hoogle.haskell.org/?hoogle={searchTerms}";
          IconURL = "https://hoogle.haskell.org/favicon64.png";
        }
      ];
      Default = "SearXNG";
      Remove = [
        "Google"
        "Bing"
        "Amazon.com"
        "eBay"
        "Twitter"
        "YouTube"
        "Yahoo"
      ];
    };
    FirefoxSuggest = {
      WebSuggestions = false;
      SponsoredSuggestions = false;
      ImproveSuggest = false;
      Locked = true;
    };
    Preferences = {
      "layout.spellcheckDefault" = {
        Value = 0;
        Status = "locked";
      };
    };
    Extensions = {
      Install =
        lib.optional withKeePassXcAddon (firefoxAddonXpiPath firefoxAddons.keepassxc-browser)
        ++ lib.optional withPassffAddon (firefoxAddonXpiPath firefoxAddons.passff)
        ++ lib.optional withRedirectorAddon (firefoxAddonXpiPath firefoxAddons.redirector)
        ++ lib.optional withSidebarTabsAddon (firefoxAddonXpiPath firefoxAddons.sidebartabs);
      Uninstall = [
        "google@search.mozilla.org"
        "bing@search.mozilla.org"
        "amazondotcom@search.mozilla.org"
        "ebay@search.mozilla.org"
        "twitter@search.mozilla.org"
        "youtube@search.mozilla.org"
        "yahoo@search.mozilla.org"
      ];
    };
  };
})