docs: add a warning to selenium-grid.md (#24236)

docs/src/selenium-grid.md

@@ -5,12 +5,22 @@ title: "Selenium Grid"
 
 Playwright can connect to [Selenium Grid Hub](https://www.selenium.dev/documentation/grid/) that runs Selenium 4 to launch **Google Chrome** or **Microsoft Edge** browser, instead of running browser on the local machine.
 
-:::note
-Before connecting Playwright to your Selenium Grid, make sure that grid works with [Selenium WebDriver](https://www.selenium.dev/documentation/webdriver/). For example, run [one of the examples](https://github.com/SeleniumHQ/selenium/tree/trunk/javascript/node/selenium-webdriver/example) and pass `SELENIUM_REMOTE_URL` environment variable.
-
-If webdriver example does not work, look for any errors at your Selenium hub/node/standalone output and search [Selenium issues](https://github.com/SeleniumHQ/selenium/issues) for a possible solution.
+:::warning
+There is a risk of Playwright integration with Selenium Grid Hub breaking in the future. Make sure you weight risks against benefits before using it.
+
+<br />
+<br />
+<details>
+<summary>
+<span style={{textTransform:'uppercase',fontSize:'smaller',fontWeight:'bold',opacity:'0.6'}}>More details</span>
+</summary>
+
+Internally, Playwright connects to the browser using [Chrome DevTools Protocol](https://chromedevtools.github.io/devtools-protocol/) websocket. Selenium 4 currently exposes this capability. However, this [might not be the case in the future](https://github.com/SeleniumHQ/selenium/issues/11590#issuecomment-1436113950). If Selenium drops this capability, Playwright will stop working with it.
+</details>
 :::
 
+Before connecting Playwright to your Selenium Grid, make sure that grid works with [Selenium WebDriver](https://www.selenium.dev/documentation/webdriver/). For example, run [one of the examples](https://github.com/SeleniumHQ/selenium/tree/trunk/javascript/node/selenium-webdriver/example) and pass `SELENIUM_REMOTE_URL` environment variable. If webdriver example does not work, look for any errors at your Selenium hub/node/standalone output and search [Selenium issues](https://github.com/SeleniumHQ/selenium/issues) for a possible solution.
+
 ## Starting Selenium Grid
 
 If you run distributed Selenium Grid, Playwright needs selenium nodes to be registered with an accessible address, so that it could connect to the browsers. To make sure it works as expected, set `SE_NODE_GRID_URL` environment variable pointing to the hub when running selenium nodes.