chore: add auth token example (#1070)

Fixes https://github.com/microsoft/playwright-mcp/issues/1069

extension/src/ui/authToken.css

@@ -68,3 +68,75 @@
 .auth-token-refresh:not(:disabled):hover {
   background-color: var(--color-btn-selected-bg);
 }
+
+.auth-token-example-section {
+  margin-top: 16px;
+}
+
+.auth-token-example-toggle {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  background: none;
+  border: none;
+  padding: 8px 0;
+  font-size: 12px;
+  color: #656d76;
+  cursor: pointer;
+  outline: none;
+  text-align: left;
+  width: 100%;
+}
+
+.auth-token-example-toggle:hover {
+  color: #1f2328;
+}
+
+.auth-token-chevron {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  transform: rotate(-90deg);
+  flex-shrink: 0;
+}
+
+.auth-token-chevron.expanded {
+  transform: rotate(0deg);
+}
+
+.auth-token-chevron svg {
+  width: 12px;
+  height: 12px;
+}
+
+.auth-token-chevron .octicon {
+  margin: 0px;
+}
+
+.auth-token-example-content {
+  margin-top: 12px;
+  padding: 12px 0;
+}
+
+.auth-token-example-description {
+  font-size: 12px;
+  color: #656d76;
+  margin-bottom: 12px;
+}
+
+.auth-token-example-config {
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  background-color: #ffffff;
+  padding: 12px;
+}
+
+.auth-token-example-code {
+  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
+  font-size: 11px;
+  color: #1f2328;
+  white-space: pre;
+  flex: 1;
+  line-height: 1.4;
+}

extension/src/ui/authToken.tsx

@@ -21,6 +21,7 @@ import './authToken.css';
 
 export const AuthTokenSection: React.FC<{}> = ({}) => {
   const [authToken, setAuthToken] = useState<string>(getOrCreateAuthToken);
+  const [isExampleExpanded, setIsExampleExpanded] = useState<boolean>(false);
 
   const onRegenerateToken = useCallback(() => {
     const newToken = generateAuthToken();
@@ -28,20 +29,69 @@ export const AuthTokenSection: React.FC<{}> = ({}) => {
     setAuthToken(newToken);
   }, []);
 
+  const toggleExample = useCallback(() => {
+    setIsExampleExpanded(!isExampleExpanded);
+  }, [isExampleExpanded]);
+
   return (
     <div className='auth-token-section'>
       <div className='auth-token-description'>
         Set this environment variable to bypass the connection dialog:
       </div>
       <div className='auth-token-container'>
-        <code className='auth-token-code'>PLAYWRIGHT_MCP_EXTENSION_TOKEN={authToken}</code>
+        <code className='auth-token-code'>{authTokenCode(authToken)}</code>
         <button className='auth-token-refresh' title='Generate new token' aria-label='Generate new token'onClick={onRegenerateToken}>{icons.refresh()}</button>
-        <CopyToClipboard value={authToken} />
+        <CopyToClipboard value={authTokenCode(authToken)} />
+      </div>
+
+      <div className='auth-token-example-section'>
+        <button
+          className='auth-token-example-toggle'
+          onClick={toggleExample}
+          aria-expanded={isExampleExpanded}
+          title={isExampleExpanded ? 'Hide example config' : 'Show example config'}
+        >
+          <span className={`auth-token-chevron ${isExampleExpanded ? 'expanded' : ''}`}>
+            {icons.chevronDown()}
+          </span>
+          Example MCP server configuration
+        </button>
+
+        {isExampleExpanded && (
+          <div className='auth-token-example-content'>
+            <div className='auth-token-example-description'>
+              Add this configuration to your MCP client (e.g., VS Code) to connect to the Playwright MCP Bridge:
+            </div>
+            <div className='auth-token-example-config'>
+              <code className='auth-token-example-code'>{exampleConfig(authToken)}</code>
+              <CopyToClipboard value={exampleConfig(authToken)} />
+            </div>
+          </div>
+        )}
       </div>
     </div>
   );
 };
 
+function authTokenCode(authToken: string) {
+  return `PLAYWRIGHT_MCP_EXTENSION_TOKEN=${authToken}`;
+}
+
+function exampleConfig(authToken: string) {
+  return `{
+  "mcpServers": {
+    "playwright": {
+      "command": "npx",
+      "args": ["@playwright/mcp@latest", "--extension"],
+      "env": {
+        "PLAYWRIGHT_MCP_EXTENSION_TOKEN":
+          "${authToken}"
+      }
+    }
+  }
+}`;
+}
+
 function generateAuthToken(): string {
   // Generate a cryptographically secure random token
   const array = new Uint8Array(32);

extension/src/ui/icons.tsx

@@ -41,3 +41,9 @@ export const refresh = () => {
     <path d="M1.705 8.005a.75.75 0 0 1 .834.656 5.5 5.5 0 0 0 9.592 2.97l-1.204-1.204a.25.25 0 0 1 .177-.427h3.646a.25.25 0 0 1 .25.25v3.646a.25.25 0 0 1-.427.177l-1.38-1.38A7.002 7.002 0 0 1 1.05 8.84a.75.75 0 0 1 .656-.834ZM8 2.5a5.487 5.487 0 0 0-4.131 1.869l1.204 1.204A.25.25 0 0 1 4.896 6H1.25A.25.25 0 0 1 1 5.75V2.104a.25.25 0 0 1 .427-.177l1.38 1.38A7.002 7.002 0 0 1 14.95 7.16a.75.75 0 0 1-1.49.178A5.5 5.5 0 0 0 8 2.5Z"></path>
   </svg>;
 };
+
+export const chevronDown = () => {
+  return <svg className='octicon' viewBox="0 0 16 16" width="16" height="16" aria-hidden='true'>
+    <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path>
+  </svg>;
+};