fix: stop forcing an extra blank tab on browser launch

src/browser/chrome.launch-args.test.ts

@@ -0,0 +1,47 @@
+import { describe, expect, it } from "vitest";
+import { buildOpenClawChromeLaunchArgs } from "./chrome.js";
+
+describe("browser chrome launch args", () => {
+  it("does not force an about:blank tab at startup", () => {
+    const args = buildOpenClawChromeLaunchArgs({
+      resolved: {
+        enabled: true,
+        controlPort: 18791,
+        cdpProtocol: "http",
+        cdpHost: "127.0.0.1",
+        cdpIsLoopback: true,
+        cdpPortRangeStart: 18800,
+        cdpPortRangeEnd: 18810,
+        evaluateEnabled: false,
+        remoteCdpTimeoutMs: 1500,
+        remoteCdpHandshakeTimeoutMs: 3000,
+        extraArgs: [],
+        color: "#FF4500",
+        headless: false,
+        noSandbox: false,
+        attachOnly: false,
+        ssrfPolicy: { allowPrivateNetwork: true },
+        defaultProfile: "openclaw",
+        profiles: {
+          openclaw: { cdpPort: 18800, color: "#FF4500" },
+        },
+      },
+      profile: {
+        name: "openclaw",
+        cdpUrl: "http://127.0.0.1:18800",
+        cdpPort: 18800,
+        cdpHost: "127.0.0.1",
+        cdpProtocol: "http",
+        cdpPath: "",
+        cdpIsLoopback: true,
+        color: "#FF4500",
+        auth: undefined,
+      },
+      userDataDir: "/tmp/openclaw-test-user-data",
+    });
+
+    expect(args).not.toContain("about:blank");
+    expect(args).toContain("--remote-debugging-port=18800");
+    expect(args).toContain("--user-data-dir=/tmp/openclaw-test-user-data");
+  });
+});

src/browser/chrome.ts

@@ -85,6 +85,44 @@ function cdpUrlForPort(cdpPort: number) {
   return `http://127.0.0.1:${cdpPort}`;
 }
 
+export function buildOpenClawChromeLaunchArgs(params: {
+  resolved: ResolvedBrowserConfig;
+  profile: ResolvedBrowserProfile;
+  userDataDir: string;
+}): string[] {
+  const { resolved, profile, userDataDir } = params;
+  const args: string[] = [
+    `--remote-debugging-port=${profile.cdpPort}`,
+    `--user-data-dir=${userDataDir}`,
+    "--no-first-run",
+    "--no-default-browser-check",
+    "--disable-sync",
+    "--disable-background-networking",
+    "--disable-component-update",
+    "--disable-features=Translate,MediaRouter",
+    "--disable-session-crashed-bubble",
+    "--hide-crash-restore-bubble",
+    "--password-store=basic",
+  ];
+
+  if (resolved.headless) {
+    args.push("--headless=new");
+    args.push("--disable-gpu");
+  }
+  if (resolved.noSandbox) {
+    args.push("--no-sandbox");
+    args.push("--disable-setuid-sandbox");
+  }
+  if (process.platform === "linux") {
+    args.push("--disable-dev-shm-usage");
+  }
+  if (resolved.extraArgs.length > 0) {
+    args.push(...resolved.extraArgs);
+  }
+
+  return args;
+}
+
 async function canOpenWebSocket(url: string, timeoutMs: number): Promise<boolean> {
   return new Promise<boolean>((resolve) => {
     const ws = openCdpWebSocket(url, { handshakeTimeoutMs: timeoutMs });
@@ -280,41 +318,11 @@ export async function launchOpenClawChrome(
 
   // First launch to create preference files if missing, then decorate and relaunch.
   const spawnOnce = () => {
-    const args: string[] = [
-      `--remote-debugging-port=${profile.cdpPort}`,
-      `--user-data-dir=${userDataDir}`,
-      "--no-first-run",
-      "--no-default-browser-check",
-      "--disable-sync",
-      "--disable-background-networking",
-      "--disable-component-update",
-      "--disable-features=Translate,MediaRouter",
-      "--disable-session-crashed-bubble",
-      "--hide-crash-restore-bubble",
-      "--password-store=basic",
-    ];
-
-    if (resolved.headless) {
-      // Best-effort; older Chromes may ignore.
-      args.push("--headless=new");
-      args.push("--disable-gpu");
-    }
-    if (resolved.noSandbox) {
-      args.push("--no-sandbox");
-      args.push("--disable-setuid-sandbox");
-    }
-    if (process.platform === "linux") {
-      args.push("--disable-dev-shm-usage");
-    }
-
-    // Append user-configured extra arguments (e.g., stealth flags, window size)
-    if (resolved.extraArgs.length > 0) {
-      args.push(...resolved.extraArgs);
-    }
-
-    // Always open a blank tab to ensure a target exists.
-    args.push("about:blank");
-
+    const args = buildOpenClawChromeLaunchArgs({
+      resolved,
+      profile,
+      userDataDir,
+    });
     return spawn(exe.path, args, {
       stdio: "pipe",
       env: {