index.md

---

title: action.setTitle()
slug: Mozilla/Add-ons/WebExtensions/API/action/setTitle
page-type: webextension-api-function
tags:
  - API
  - Add-ons
  - Extensions
  - Method
  - Reference
  - WebExtensions
  - action
  - setTitle
browser-compat: webextensions.api.action.setTitle

---

{{AddonSidebar}}

Sets the browser action's title. The title is displayed in a tooltip over the browser action's icon. You can pass a tabId in or a windowId as an optional parameter — if you do this then the title is changed only for the specified tab or window. Tabs or windows without a specific title inherit the global title text, which defaults to the default_title or name specified in the manifest.

Note: This API is available in Manifest V3 or higher.

Syntax

browser.action.setTitle(
  details // object
)

Parameters

• details

  • : object. The new title and optionally the ID of the tab or window to target.

    • title

      • : string or null. The string the browser action should display when moused over.

        If title is an empty string, the used title will be the extension name, but {{WebExtAPIRef("action.getTitle")}} will still provide the empty string.

        If title is null:

        • If tabId is specified, and the tab has a tab-specific title set, then the tab will inherit the title from the window to which it belongs.

        • if windowId is specified, and the window has a window-specific title set, then the window will inherit the global title.

        • Otherwise, the global title will be reset to the manifest title.

    • tabId {{optional_inline}}

      • : integer. Sets the title only for the given tab.

    • windowId {{optional_inline}}

      • : integer. Sets the title for the given window.

• If windowId and tabId are both supplied, the function fails and the title is not set.

• If windowId and tabId are both omitted, the global title is set.

Examples

This code switches the title between "this" and "that" each time the user clicks the browser action:

function toggleTitle(title) {
  if (title === "this") {
    browser.action.setTitle({ title: "that" });
  } else {
    browser.action.setTitle({ title: "this" });
  }
}

browser.action.onClicked.addListener(() => {
  let gettingTitle = browser.action.getTitle({});
  gettingTitle.then(toggleTitle);
});

{{WebExtExamples}}

Browser compatibility

{{Compat}}

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