firefox-devtools-mcp: init at 0.9.9

Assisted-by: Claude Code (claude-opus-4-8)

pkgs/by-name/fi/firefox-devtools-mcp/package.nix

@@ -0,0 +1,69 @@
+{
+  lib,
+  buildNpmPackage,
+  fetchFromGitHub,
+  makeWrapper,
+  geckodriver,
+  nix-update-script,
+}:
+
+buildNpmPackage (finalAttrs: {
+  pname = "firefox-devtools-mcp";
+  version = "0.9.9";
+
+  __structuredAttrs = true;
+
+  src = fetchFromGitHub {
+    owner = "mozilla";
+    repo = "firefox-devtools-mcp";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-Bz6LkiUbgu81OnPv6xegmo7EYVgGJdlbB5HZsW4QO/Q=";
+  };
+
+  npmDepsHash = "sha256-JnAivSiThEm+EPm6gY08zQfD/aaF2sLfz6YSfsle9uE=";
+
+  # 0.9.9 ships a stale hardcoded server version (0.7.1) in constants.ts; upstream switched to
+  # build-time injection right after release (Bug 2050918), so this substitution should be dropped
+  # once that fix lands in a tagged release.
+  postPatch = ''
+    substituteInPlace src/config/constants.ts \
+      --replace-fail "'0.7.1'" "'${finalAttrs.version}'"
+  '';
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  # The `geckodriver` npm dependency's install script downloads a prebuilt binary from the network,
+  # which is unavailable in the sandbox. The server locates geckodriver on PATH first (see
+  # src/firefox/core.ts), so skip the install scripts and provide geckodriver from nixpkgs via the
+  # wrapper below.
+  npmFlags = [ "--ignore-scripts" ];
+
+  # `npm run build` (tsup) emits dist/index.js, the package's bin entry point.
+  postInstall = ''
+    wrapProgram $out/bin/firefox-devtools-mcp \
+      --prefix PATH : ${lib.makeBinPath [ geckodriver ]}
+  '';
+
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    description = "Model Context Protocol server for Firefox DevTools automation";
+    longDescription = ''
+      A Model Context Protocol (MCP) server that automates Firefox via WebDriver BiDi.
+      It works with MCP clients such as Claude Code, Claude Desktop, Cursor and Cline,
+      exposing tools to navigate pages, take snapshots, inspect the DOM, capture network requests
+      and console messages, take screenshots and more.
+
+      A local Firefox installation is required at runtime.
+    '';
+    homepage = "https://github.com/mozilla/firefox-devtools-mcp";
+    changelog = "https://github.com/mozilla/firefox-devtools-mcp/blob/v${finalAttrs.version}/CHANGELOG.md";
+    license = with lib.licenses; [
+      mit
+      asl20
+    ];
+    maintainers = with lib.maintainers; [ philiptaron ];
+    mainProgram = "firefox-devtools-mcp";
+    platforms = lib.platforms.unix;
+  };
+})