console.log('background') browser.contextMenus.create( { id: 'map-inline', title: 'MapInline', contexts: ['page', 'selection'], }, () => void browser.runtime.lastError, ) browser.contextMenus.onClicked.addListener((info, tab) => { if (info.menuItemId !== 'map-inline') return browser.tabs.sendMessage(tab.id, 'map-inline') })