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 given tab or the given window. Tabs or windows without a specific title will inherit the global title text, which defaults to the default_title or name specified in the manifest.


  details // object


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

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 browserAction.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.

integer. Sets the title only for the given tab.


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.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaSafariFirefox for Android
setTitleChrome Full support YesEdge Full support 15Firefox Full support 45
Full support 45
No support 45 — 58
Notes Tab-specific titles are not cleared when a new page is loaded.
Opera Full support YesSafari Full support 14Firefox Android Full support 55
Full support 55
No support 55 — 58
Notes Tab-specific titles are not cleared when a new page is loaded.
details.windowIdChrome No support NoEdge No support NoFirefox Full support 62Opera No support NoSafari No support NoFirefox Android Full support 79
The title property of the details parameter can be set to null.Chrome No support NoEdge No support NoFirefox Full support 59Opera No support NoSafari Full support 14Firefox Android Full support 79


Full support  
Full support
No support  
No support
See implementation notes.
See implementation notes.


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

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

browser.browserAction.onClicked.addListener(() => {
  var gettingTitle = browser.browserAction.getTitle({});

Example extensions


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

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.