sidebarAction.getPanel()

details

object. An object with the following properties:

tabId Optional

integer. Get the panel for the sidebar specific to the given tab.

windowId Optional

integer. Get the panel for the sidebar specific to the given window.

• If windowId and tabId are both supplied, the function fails and the promise it returns is rejected.
• If windowId and tabId are both omitted, the global panel is returned.

A Promise that will be fulfilled with a string containing the URL for the panel's document. This will be a fully qualified URL, such as:

moz-extension://d1d8a2eb-fe60-f646-af30-a866c5b39942/sidebar.html

Get the panel's URL:

function onGot(sidebarUrl) {
  console.log(sidebarUrl);
}

let gettingPanel = browser.sidebarAction.getPanel({});
gettingPanel.then(onGot);