fix(static): exclude block_ads from HTTP request args

block_ads is a browser-engine parameter (used by PlayWright/Camoufox
fetchers for ad-domain blocking) and is not recognised by curl_cffi's
Session.request(). When the CLI's --ai-targeted flag sets block_ads=True,
_merge_request_args forwards it unfiltered, causing:

  TypeError: Session.request() got an unexpected keyword argument 'block_ads'

Add block_ads to the skip_keys set so it is stripped before the dict
reaches Session.request(), consistent with existing entries for
extra_headers and google_search.

Fixes #247

scrapling/engines/static.py

@@ -149,6 +149,7 @@ class _ConfigurationLogic(ABC):
             # Browser session params (ignored by HTTP sessions)
             "extra_headers",
             "google_search",
+            "block_ads",
         }
         for k, v in method_kwargs.items():
             if k not in skip_keys and v is not None:

tests/fetchers/test_merge_request_args.py

@@ -0,0 +1,44 @@
+"""Tests for _merge_request_args to ensure browser-only kwargs are excluded.
+
+Regression tests for https://github.com/D4Vinci/Scrapling/issues/247
+"""
+
+import pytest
+
+from scrapling.engines.static import FetcherClient
+
+
+class TestMergeRequestArgsSkipsBrowserParams:
+    """Verify that browser-only keyword arguments are stripped before
+    the request dict is forwarded to curl_cffi's Session.request()."""
+
+    def _build_args(self, **extra_kwargs):
+        """Helper: instantiate a FetcherClient and call _merge_request_args."""
+        client = FetcherClient()
+        return client._merge_request_args(url="https://example.com", **extra_kwargs)
+
+    def test_block_ads_excluded(self):
+        """block_ads is a browser-engine param and must not leak into the
+        HTTP request dict (fixes #247)."""
+        args = self._build_args(block_ads=True)
+        assert "block_ads" not in args
+
+    def test_google_search_excluded(self):
+        """google_search is a browser-engine param and should be stripped."""
+        args = self._build_args(google_search=True)
+        assert "google_search" not in args
+
+    def test_extra_headers_excluded(self):
+        """extra_headers is a browser-engine param and should be stripped."""
+        args = self._build_args(extra_headers={"X-Custom": "val"})
+        assert "extra_headers" not in args
+
+    def test_url_present(self):
+        """The url must always be present in the output dict."""
+        args = self._build_args()
+        assert args["url"] == "https://example.com"
+
+    def test_valid_kwargs_passed_through(self):
+        """Arbitrary curl_cffi-compatible kwargs should survive."""
+        args = self._build_args(cookies={"session": "abc"})
+        assert args.get("cookies") == {"session": "abc"}