Add value of TAB_ID_NONE

[moritztim]

MDN URL

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/TAB_ID_NONE

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

The value of the constant is not mentioned.

What did you expect to see?

As defined here, the value of this constant is -1. I think it would be helpful to add this to the docs.

Do you have any supporting links, references, or citations?

https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/api/tabs.json#150

Do you have anything more you want to share?

No response