Navigator.platform property reverts after navigation

[6b70]

Rod Version: v0.113.4

The code to demonstrate your question

func navigatorTest() {
	chromePath, found := launcher.LookPath()
	if !found {
		panic("chrome not found")
	}

	u := launcher.New().
		Headless(false).
		Bin(chromePath).
		Leakless(true).
		MustLaunch()

	browser := rod.New().NoDefaultDevice().ControlURL(u).MustConnect()
	defer browser.MustClose()

	userAgentOptions := &proto.NetworkSetUserAgentOverride{
		UserAgent: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36",
		Platform:  "MacIntel",
	}
	page := browser.MustPage("")
	err := page.SetUserAgent(userAgentOptions)
	if err != nil {
		panic(err)
	}

	page.MustNavigate("https://example.com/")
	utils.Sleep(20) //Check navigator.platform in console
	page.MustNavigate("https://google.com/")
	utils.Sleep(20) //Check navigator.platform in console
}

What you got

navigator.platform value in chrome dev console reverts from MacIntel to Win32 with the second page navigation.

What you expected to see

The value of all navigator properties to stay the same when navigating in the same page context.
The navigator.useragent property doesn't change after the navigation to the second site in this same code.

I am not sure if this is expected behavior when working with changing pages?

[ysmood]

Works fine to me:

package main

import (
	"fmt"

	"github.com/go-rod/rod"
	"github.com/go-rod/rod/lib/proto"
)

func main() {
	page := rod.New().MustConnect().MustPage("")
	page.MustSetUserAgent(&proto.NetworkSetUserAgentOverride{
		UserAgent: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36",
		Platform:  "XXXX",
	})

	page.MustNavigate("https://example.com/").MustWaitStable()
	fmt.Println(page.MustEval(`() => navigator.platform`).String())

	page.MustNavigate("https://google.com/").MustWaitStable()
	fmt.Println(page.MustEval(`() => navigator.platform`).String())
}

[6b70]

I think my issue was due chrome devtools. The overridden navigator.platform property was preserved during navigation as long as DevTools isn't opened. When I open it (even if I dont run any commands), the navigator.platform reverts back when the page navigates to a new URL.
Maybe it resets the value when attaching the debugging session?
No issues when checking navigator with:

fmt.Println(page.MustEval(`() => navigator.platform`).String())

Thanks for the fast response