nit: you don't have to do that, but for future reference, as practice we use the test's name itself for `data:` url. Like:
```js
    const url = "data:text/html;charset=utf-8,testContentScriptWhenForNewTabs";
```
So if something goes wrong, like it hangs or something, we knew immediately which test is the one we have to check, just checking the url currently opened.