Bug 1967694 - add a UA override for onlyfaucet.com; r=denschub,webcompat-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D250448

browser/extensions/webcompat/data/interventions.json

@@ -3680,5 +3680,20 @@
         }
       }
     ]
+  },
+  "1967694": {
+    "label": "onlyfaucet.com",
+    "bugs": {
+      "1967694": {
+        "issue": "firefox-blocked-completely",
+        "matches": ["*://*.onlyfaucet.com/*"]
+      }
+    },
+    "interventions": [
+      {
+        "platforms": ["all"],
+        "ua_string": ["Chrome", "add_Firefox_as_Gecko"]
+      }
+    ]
   }
 }

testing/webcompat/interventions/tests/test_1967694_onlyfaucet_com.py

@@ -0,0 +1,21 @@
+import pytest
+
+URL = "https://onlyfaucet.com/"
+BLOCKED_CSS = "#cf-error-details"
+UNBLOCKED_CSS = "#content"
+
+
+@pytest.mark.asyncio
+@pytest.mark.with_interventions
+async def test_enabled(client):
+    await client.navigate(URL)
+    assert client.await_css(UNBLOCKED_CSS, is_displayed=True)
+    assert not client.find_css(BLOCKED_CSS, is_displayed=True)
+
+
+@pytest.mark.asyncio
+@pytest.mark.without_interventions
+async def test_disabled(client):
+    await client.navigate(URL)
+    assert client.await_css(BLOCKED_CSS, is_displayed=True)
+    assert not client.find_css(UNBLOCKED_CSS, is_displayed=True)