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Shows the page action for a given tab. The page action is shown whenever the given tab is the active tab.

show() overrides pattern matching, so the page action will be shown in the specified tab even if show_matches does not match the URL or hide_matches does.

Note that calling show() has no effect on a tab with no content loaded.

  tabId // integer


integer. The ID of the tab for which you want to show the page action.

Return value

A Promise that will be fulfilled with undefined.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaFirefox for Android
showChrome Full support YesEdge Full support 14Firefox Full support 45Opera Full support YesFirefox Android Full support 50
Full support 50
Notes Before version 56, the 'tabId' parameter was ignored, and the page action was shown for all tabs.


Full support  
Full support
See implementation notes.
See implementation notes.


This example shows the page action for the active tab when the user selects a context menu item. Note that you'll need the contextMenus permission in your manifest to create context menu items.

  id: "show",
  title: "Show page action"

browser.contextMenus.onClicked.addListener(function(info, tab) {
  if (info.menuItemId == "show") {;

Example extensions


This API is based on Chromium's chrome.pageAction API. This documentation is derived from page_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.