refactor: firefox: split out an option for nativeMessagingHosts

hosts/common/programs/firefox/addons.nix

@@ -13,10 +13,12 @@ in
         # future: maybe better to have browser open all videos in mpv, and then use mpv for casting.
         # see e.g. `ff2mpv`, `open-in-mpv` (both are packaged in nixpkgs)
         package = pkgs.firefox-extensions.fx_cast;
+        nativeMessagingHosts = [ pkgs.fx-cast-bridge ];
         enable = lib.mkDefault false;
       };
       browserpass-extension = {
         package = pkgs.firefox-extensions.browserpass-extension;
+        nativeMessagingHosts = [ pkgs.browserpass ];
         enable = lib.mkDefault true;
       };
       bypass-paywalls-clean = {

hosts/common/programs/firefox/default.nix

@@ -7,7 +7,6 @@
 # see: https://gitlab.com/librewolf-community/settings/-/blob/master/distribution/policies.json
 
 { config, lib, pkgs, ...}:
-with lib;
 let
   cfg = config.sane.programs.firefox.config;
   mobile-prefs = lib.optionals false pkgs.librewolf-pmos-mobile.extraPrefsFiles;
@@ -36,13 +35,13 @@ let
     # it can be further customized via ~/.librewolf/librewolf.overrides.cfg
     inherit (cfg.browser) extraPrefsFiles libName;
 
-    nativeMessagingHosts = lib.optionals cfg.addons.browserpass-extension.enable [
-      pkgs.browserpass
-    ] ++ lib.optionals cfg.addons.fxCast.enable [
-      pkgs.fx-cast-bridge
-    ];
+    nativeMessagingHosts = lib.flatten (
+      lib.mapAttrsToList
+        (_: addonOpts: lib.optionals addonOpts.enable addonOpts.nativeMessagingHosts)
+        cfg.addons
+    );
 
-    nixExtensions = concatMap (ext: optional ext.enable ext.package) (attrValues cfg.addons);
+    nixExtensions = lib.concatMap (ext: lib.optional ext.enable ext.package) (builtins.attrValues cfg.addons);
   }).overrideAttrs (base: {
     nativeBuildInputs = (base.nativeBuildInputs or []) ++ [
       pkgs.copyDesktopItems
@@ -112,7 +111,7 @@ in
   ];
 
   sane.programs.firefox = {
-    configOption = mkOption {
+    configOption = with lib; mkOption {
       default = {};
       type = types.submodule {
         options = {
@@ -137,6 +136,10 @@ in
                 package = mkOption {
                   type = types.package;
                 };
+                nativeMessagingHosts = mkOption {
+                  type = types.listOf types.package;
+                  default = [];
+                };
                 enable = mkOption {
                   type = types.bool;
                 };