test: tighten browser cdp screenshot assertions

extensions/browser/src/browser/cdp.screenshot-params.test.ts

@@ -107,9 +107,7 @@ describe("CDP screenshot params", () => {
     await captureScreenshot({ wsUrl: "ws://localhost:9222/devtools/page/X", format: "png" });
 
     const call = requireSentMessage("Page.captureScreenshot");
-    expect(call.params).toMatchObject({
-      format: "png",
-    });
+    expect(call.params?.format).toBe("png");
     expect(call.params).not.toHaveProperty("fromSurface");
     expect(call.params).not.toHaveProperty("captureBeyondViewport");
     expect(call.params).not.toHaveProperty("clip");
@@ -152,27 +150,23 @@ describe("CDP screenshot params", () => {
     }
 
     // Expand: uses saved DPR, mobile defaults to false
-    expect(firstSetCall.params).toMatchObject({
-      width: 1200,
-      height: 3000,
-      deviceScaleFactor: 2,
-      mobile: false,
-    });
+    expect(firstSetCall.params?.width).toBe(1200);
+    expect(firstSetCall.params?.height).toBe(3000);
+    expect(firstSetCall.params?.deviceScaleFactor).toBe(2);
+    expect(firstSetCall.params?.mobile).toBe(false);
 
     // Clear is called first in the finally block
     requireSentMessage("Emulation.clearDeviceMetricsOverride");
     const captureCall = requireSentMessage("Page.captureScreenshot");
-    expect(captureCall.params).toMatchObject({ captureBeyondViewport: true });
+    expect(captureCall.params?.captureBeyondViewport).toBe(true);
 
     // Viewport drifted after clear → re-apply saved dimensions
-    expect(secondSetCall.params).toMatchObject({
-      width: 800,
-      height: 600,
-      deviceScaleFactor: 2,
-      mobile: false,
-      screenWidth: 800,
-      screenHeight: 600,
-    });
+    expect(secondSetCall.params?.width).toBe(800);
+    expect(secondSetCall.params?.height).toBe(600);
+    expect(secondSetCall.params?.deviceScaleFactor).toBe(2);
+    expect(secondSetCall.params?.mobile).toBe(false);
+    expect(secondSetCall.params?.screenWidth).toBe(800);
+    expect(secondSetCall.params?.screenHeight).toBe(600);
   });
 
   it("fullPage on non-emulated tab: clears and does NOT re-apply emulation", async () => {