Vim-Vixen/src/background/infrastructures/content-message-client.js

import messages from '../../shared/messages';

export default class ContentMessageClient {
  async broadcastSettingsChanged() {
    let tabs = await browser.tabs.query({});
    for (let tab of tabs) {
      browser.tabs.sendMessage(tab.id, {
        type: messages.SETTINGS_CHANGED,
      });
    }
  }
}