api.HTMLElement.focus - incompabile behaviour on input elements

What type of issue is this?

Browser bug (a bug with a feature that may impact site compatibility)

What information was incorrect, unhelpful, or incomplete?

I've noticed that on WebKitGTK calling focus also selects the value of input elements. On Firefox, you're required to call focus and select.

What browsers does this problem apply to, if applicable?

Safari

What did you expect to see?

As per the spec, it seems that focus shouldn't select.

Did you test this? If so, how?

Tested on WebKitGTK and Firefox.

<input id="myTextField" value="Text field." />
<button id="focusButton">Click to set focus on the text field</button>

document.getElementById("focusButton").addEventListener("click", () => {
  document.getElementById("myTextField").focus();
});

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

No response

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus

MDN metadata

Start with the api.HTMLElement.focus entry and the linked MDN page, then reproduce the provided HTML and JavaScript in WebKitGTK and Firefox. Compare the observed selection behavior with the linked HTML specification and existing compatibility data; done means the behavior is verified and the appropriate compatibility record is corrected or confirmed.