sidebarAction.close()

Closes the sidebar in the active window, if it is the extension's own sidebar.

You can only call this function from inside the handler for a user action.

This is an asynchronous function that returns a Promise.

None.

A Promise that is resolved with no arguments.

Close the sidebar when the user selects a context menu item:

browser.menus.create({
  id: "close-sidebar",
  title: "close sidebar",
  contexts: ["all"]
});

browser.menus.onClicked.addListener(() => {
  browser.sidebarAction.close();
});