fix: open links in a cross platform way

build/fsfe_website_build/phase3/serve_websites.py

@@ -7,13 +7,10 @@ import http.server
 import logging
 import multiprocessing
 import os
-import shutil
 import socketserver
+import webbrowser
 from pathlib import Path
 
-from fsfe_website_build.globals import FALLBACK_LANG
-from fsfe_website_build.lib.misc import run_command
-
 logger = logging.getLogger(__name__)
 
 
@@ -46,8 +43,7 @@ def serve_websites(
         port = base_port + (increment_number * index)
         url = f"http://127.0.0.1:{port}"
         logger.info("%s served at %s", directory.name, url)
-        if shutil.which("xdg-open") is not None:
-            run_command(["xdg-open", url + f"/index.{FALLBACK_LANG}.html"])
+        webbrowser.open(url + "/index.en.html")
         serves.append((str(directory), port))
     with multiprocessing.Pool(len(serves)) as pool:
         pool.starmap(_run_webserver, serves)