feat(tools): add Firecrawl cloud browser provider (#5628)

* feat(tools): add Firecrawl cloud browser provider

Adds Firecrawl (https://firecrawl.dev) as a cloud browser provider
alongside Browserbase and Browser Use. All browser tools route through
Firecrawl's cloud browser via CDP when selected.

- tools/browser_providers/firecrawl.py — FirecrawlProvider
- tools/browser_tool.py — register in _PROVIDER_REGISTRY
- hermes_cli/tools_config.py — add to onboarding provider picker
- hermes_cli/setup.py — add to setup summary
- hermes_cli/config.py — add FIRECRAWL_BROWSER_TTL config
- website/docs/ — browser docs and env var reference

Based on #4490 by @developersdigest.

Co-Authored-By: Developers Digest <124798203+developersdigest@users.noreply.github.com>

* refactor: simplify FirecrawlProvider.emergency_cleanup

Use self._headers() and self._api_url() instead of duplicating
env-var reads and header construction.

* fix: recognize Firecrawl in subscription browser detection

_resolve_browser_feature_state() now handles "firecrawl" as a direct
browser provider (same pattern as "browser-use"), so hermes setup
summary correctly shows "Browser Automation (Firecrawl)" instead of
misreporting as "Local browser".

Also fixes test_config_version_unchanged assertion (11 → 12).

---------

Co-authored-by: Developers Digest <124798203+developersdigest@users.noreply.github.com>

tools/browser_tool.py

@@ -79,6 +79,7 @@ except Exception:
 from tools.browser_providers.base import CloudBrowserProvider
 from tools.browser_providers.browserbase import BrowserbaseProvider
 from tools.browser_providers.browser_use import BrowserUseProvider
+from tools.browser_providers.firecrawl import FirecrawlProvider
 from tools.tool_backend_helpers import normalize_browser_cloud_provider
 
 # Camofox local anti-detection browser backend (optional).
@@ -235,6 +236,7 @@ def _get_cdp_override() -> str:
 _PROVIDER_REGISTRY: Dict[str, type] = {
     "browserbase": BrowserbaseProvider,
     "browser-use": BrowserUseProvider,
+    "firecrawl": FirecrawlProvider,
 }
 
 _cached_cloud_provider: Optional[CloudBrowserProvider] = None
@@ -2036,12 +2038,12 @@ def check_browser_requirements() -> bool:
     """
     Check if browser tool requirements are met.
 
-    In **local mode** (no Browserbase credentials): only the ``agent-browser``
-    CLI must be findable.
+    In **local mode** (no cloud provider configured): only the
+    ``agent-browser`` CLI must be findable.
+
+    In **cloud mode** (Browserbase, Browser Use, or Firecrawl): the CLI
+    *and* the provider's required credentials must be present.
 
-    In **cloud mode** (BROWSERBASE_API_KEY set): the CLI *and* both
-    ``BROWSERBASE_API_KEY`` / ``BROWSERBASE_PROJECT_ID`` must be present.
-    
     Returns:
         True if all requirements are met, False otherwise
     """