example.js

chrome.onMessage.onClicked.addListener(message => {
  if (message === 'some action') {
    chrome.tabs.query(
      {
        active: true,
        currentWindow: true,
      },
      tabs => {
        const activeTab = tabs[0];
        chrome.tabs.executeScript(activeTab.id, {
          code: 'your js script',
        });
      },
    );
  }
});