diff --git a/README.md b/README.md
index 891bbd7..0da4671 100644
--- a/README.md
+++ b/README.md
@@ -198,13 +198,14 @@ python -m webwright.run.cli \
 
 ### 🚩 Flags
 
-| Flag | Description |
-|------|-------------|
+| Flag / Command | Description |
+|----------------|-------------|
 | `-c` | Config file(s) from `src/webwright/config/` (stackable). |
 | `-t` | Task instruction. |
 | `--start-url` | Initial page. |
 | `--task-id` | Output subfolder name. |
 | `-o` | Output directory. |
+| `list-configs` | Print all available built-in config file names (`python -m webwright.run.cli list-configs`). |
 
 ---
 
diff --git a/src/webwright/run/cli.py b/src/webwright/run/cli.py
index 343ab70..561c4c5 100644
--- a/src/webwright/run/cli.py
+++ b/src/webwright/run/cli.py
@@ -8,7 +8,7 @@
 from rich.console import Console
 
 from webwright.agents import get_agent
-from webwright.config import get_config_from_spec, snapshot_config_specs
+from webwright.config import builtin_config_dir, get_config_from_spec, snapshot_config_specs
 from webwright.environments import get_environment
 from webwright.models import get_model
 from webwright.utils.serialize import UNSET, recursive_merge
@@ -17,7 +17,7 @@
 
 DEFAULT_CONFIGS = ["base.yaml", "model_openai.yaml"]
 
-app = typer.Typer(no_args_is_help=True)
+app = typer.Typer()
 console = Console(highlight=False)
 
 
@@ -134,10 +134,22 @@ def run_one(
     return result
 
 
-@app.command()
+@app.command("list-configs")
+def list_configs() -> None:
+    """List all available built-in config files."""
+    configs = sorted(builtin_config_dir.glob("*.yaml"))
+    if not configs:
+        console.print("No config files found.")
+        return
+    for path in configs:
+        console.print(path.name)
+
+
+@app.callback(invoke_without_command=True)
 def main(
-    task: str = typer.Option(
-        ..., "-t", "--task", help="Natural language task description."
+    ctx: typer.Context,
+    task: str | None = typer.Option(
+        None, "-t", "--task", help="Natural language task description."
     ),
     task_id: str | None = typer.Option(
         None, "--task-id", help="Optional identifier used in the output directory name."
@@ -153,6 +165,11 @@ def main(
         help="Launch headed local Playwright with devtools and keep it open for inspection.",
     ),
 ) -> Any:
+    if ctx.invoked_subcommand is not None:
+        return
+    if task is None:
+        console.print(ctx.get_help())
+        raise typer.Exit()
     return run_one(
         task=task,
         task_id=task_id,
diff --git a/src/webwright/run/doctor.py b/src/webwright/run/doctor.py
index d64d5ed..20ed762 100644
--- a/src/webwright/run/doctor.py
+++ b/src/webwright/run/doctor.py
@@ -27,7 +27,7 @@ def check_playwright():
     return False, ("playwright not installed\nFix: pip install playwright")
 
 
-def check_chromium():
+def check_firefox():
     try:
         result = subprocess.run(
             ["playwright", "install", "--dry-run"],
@@ -36,9 +36,9 @@ def check_chromium():
         )
 
         if result.returncode == 0:
-            return True, "chromium available"
+            return True, "firefox available"
 
-        return False, ("chromium missing\nFix: playwright install chromium")
+        return False, ("firefox missing\nFix: playwright install firefox")
 
     except Exception as e:
         return False, str(e)
@@ -51,7 +51,7 @@ def check_screenshot():
         screenshot_path = Path("doctor_test.png")
 
         with sync_playwright() as p:
-            browser = p.chromium.launch(headless=True)
+            browser = p.firefox.launch(headless=True)
 
             page = browser.new_page()
 
@@ -70,8 +70,8 @@ def check_screenshot():
 
     except Exception:
         return False, (
-            "unable to launch Chromium for screenshot validation\n"
-            "Fix: playwright install"
+            "unable to launch Firefox for screenshot validation\n"
+            "Fix: playwright install firefox"
         )
 
 
@@ -108,7 +108,7 @@ def check_plugin_manifests():
 CHECKS = [
     ("Python", check_python),
     ("Playwright", check_playwright),
-    ("Chromium", check_chromium),
+    ("Firefox", check_firefox),
     ("Screenshot", check_screenshot),
     ("OpenAI Key", check_openai_key),
     ("Plugins", check_plugin_manifests),
diff --git a/tests/unit/test_doctor.py b/tests/unit/test_doctor.py
index af2cdd1..1c12986 100644
--- a/tests/unit/test_doctor.py
+++ b/tests/unit/test_doctor.py
@@ -1,7 +1,7 @@
 from pathlib import Path
 
 from webwright.run.doctor import (
-    check_chromium,
+    check_firefox,
     check_openai_key,
     check_playwright,
     check_plugin_manifests,
@@ -24,8 +24,8 @@ def test_check_playwright():
     assert isinstance(message, str)
 
 
-def test_check_chromium():
-    ok, message = check_chromium()
+def test_check_firefox():
+    ok, message = check_firefox()
 
     assert isinstance(ok, bool)
     assert isinstance(message, str)