diff --git a/src/auto_archiver/core/base_module.py b/src/auto_archiver/core/base_module.py
index d717e4b..642b8ee 100644
--- a/src/auto_archiver/core/base_module.py
+++ b/src/auto_archiver/core/base_module.py
@@ -59,7 +59,8 @@ class BaseModule(ABC):
             setattr(self, key, val)
 
     def setup(self):
-        # For any additional setup required by modules, e.g. autehntication
+        # For any additional setup required by modules outside of the configs in the manifesst,
+        # e.g. authentication
         pass
 
     def auth_for_site(self, site: str, extract_cookies=True) -> Mapping[str, Any]:
@@ -88,7 +89,7 @@ class BaseModule(ABC):
         # TODO: think about if/how we can deal with sites that have multiple domains (main one is x.com/twitter.com)
         # for now the user must enter them both, like "x.com,twitter.com" in their config. Maybe we just hard-code?
 
-        site = UrlUtil.domain_for_url(site).lstrip("www.")
+        site = UrlUtil.domain_for_url(site).removeprefix("www.")
         # add the 'www' version of the site to the list of sites to check
         authdict = {}
 
diff --git a/src/auto_archiver/core/config.py b/src/auto_archiver/core/config.py
index 6c4300f..59c1eec 100644
--- a/src/auto_archiver/core/config.py
+++ b/src/auto_archiver/core/config.py
@@ -65,7 +65,7 @@ class AuthenticationJsonParseAction(argparse.Action):
             auth_dict = json.loads(values)
             setattr(namespace, self.dest, auth_dict)
         except json.JSONDecodeError as e:
-            raise argparse.ArgumentTypeError(f"Invalid JSON input for argument '{self.dest}': {e}")
+            raise argparse.ArgumentTypeError(f"Invalid JSON input for argument '{self.dest}': {e}") from e
 
         def load_from_file(path):
             try:
diff --git a/src/auto_archiver/core/module.py b/src/auto_archiver/core/module.py
index 6eac968..94b4e48 100644
--- a/src/auto_archiver/core/module.py
+++ b/src/auto_archiver/core/module.py
@@ -194,7 +194,7 @@ class LazyBaseModule:
             try:
                 manifest.update(ast.literal_eval(f.read()))
             except (ValueError, TypeError, SyntaxError, MemoryError, RecursionError) as e:
-                raise ValueError(f"Error loading manifest from file {self.path}/{MANIFEST_FILE}: {e}")
+                raise ValueError(f"Error loading manifest from file {self.path}/{MANIFEST_FILE}: {e}") from e
 
         self._manifest = manifest
         self._entry_point = manifest["entry_point"]