adjust daily summary to use browser extension for history

pkgs/firefox-history-exporter/package.nix

@@ -0,0 +1,32 @@
+{ pkgs, ... }:
+
+pkgs.stdenv.mkDerivation {
+  pname = "firefox-history-exporter";
+  version = "1.0";
+  src = ./.;
+
+  nativeBuildInputs = [ pkgs.zip ];
+
+  # We are not building anything, just packaging.
+  dontBuild = true;
+
+  installPhase = ''
+    # The directory structure expected by Firefox and home-manager.
+    # The UUID is the official application ID for Firefox.
+    install_dir=$out/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}
+    mkdir -p $install_dir
+
+    # The filename of the .xpi file serves as the extension's ID.
+    # An email-like format is a common convention.
+    extension_id="firefox-history-exporter@localhost.xpi"
+
+    # Go into the source directory and zip all files into the .xpi archive.
+    # This ensures the manifest.json is at the root of the archive.
+    (cd $src; zip $install_dir/$extension_id *)
+  '';
+
+  meta = with pkgs.lib; {
+    description = "Automatically exports today's browsing history.";
+    license = licenses.mit;
+  };
+}