action.isEnabled()

details

object. An object optionally containing the tabId or windowId to check.

tabId Optional

integer. ID of a tab to check.

windowId Optional

integer. ID of a window to check.

• If windowId and tabId are both supplied, the function fails.
• If windowId and tabId are both omitted, the global enabled/disabled status is returned.

A Promise that will be fulfilled with true if the extension's browser action is enabled, and false otherwise.

Check the global state:

browser.action.isEnabled({}).then((result) => {
  console.log(result);
});

Check the state of the currently active tab:

async function enabledInActiveTab() {
  let tabs = await browser.tabs.query({
    currentWindow: true,
    active: true,
  });
  let enabled = await browser.action.isEnabled({
    tabId: tabs[0].id,
  });
  console.log(enabled);
}