tabs.TAB_ID_NONE

A special ID value given to tabs that are not browser tabs (for example, tabs in devtools windows).

Its value is -1.

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Firefox for Android
Safari on iOS
TAB_ID_NONE

Note: This API is based on Chromium's chrome.tabs API. This documentation is derived from tabs.json in the Chromium code.