browserAction.getBadgeText()

details

An object with the following properties:

tabId Optional

integer. Specifies the tab from which to get the badge text.

windowId Optional

integer. Specifies the window from which to get the badge text.

• If windowId and tabId are both supplied, the function fails.
• If windowId and tabId are both omitted, the global badge text is returned.

A Promise that will be fulfilled with a string containing the badge text.

Log the badge text:

function gotBadgeText(text) {
  console.log(text);
}

let gettingBadgeText = browser.browserAction.getBadgeText({});
gettingBadgeText.then(gotBadgeText);