worker.js

self.importScripts('context.js');

const state = () => chrome.storage.local.get({
  'enabled': false,
  'csp-1': true,
  'csp-2': true,
  'csp-3': true,
  'csp-4': true
}, prefs => {
  const o = {
    enableRulesetIds: [],
    disableRulesetIds: []
  };

  if (prefs.enabled) {
    chrome.action.setIcon({
      path: {
        16: 'data/icons/16.png',
        32: 'data/icons/32.png',
        48: 'data/icons/48.png'
      }
    });
    o[prefs['csp-1'] ? 'enableRulesetIds' : 'disableRulesetIds'].push('csp-1');
    o[prefs['csp-2'] ? 'enableRulesetIds' : 'disableRulesetIds'].push('csp-2');
    o[prefs['csp-3'] ? 'enableRulesetIds' : 'disableRulesetIds'].push('csp-3');
    o[prefs['csp-4'] ? 'enableRulesetIds' : 'disableRulesetIds'].push('csp-4');
  }
  else {
    o.disableRulesetIds = ['csp-1', 'csp-2', 'csp-3', 'csp-4'];

    chrome.action.setIcon({
      path: {
        16: 'data/icons/disabled/16.png',
        32: 'data/icons/disabled/32.png',
        48: 'data/icons/disabled/48.png'
      }
    });
  }

  chrome.declarativeNetRequest.updateEnabledRulesets(o);
});
state();
chrome.storage.onChanged.addListener(ps => {
  if (ps.enabled || ps['csp-1'] || ps['csp-2'] || ps['csp-3'] || ps['csp-4']) {
    state();
  }
});

// action
chrome.action.onClicked.addListener(() => chrome.storage.local.get({
  enabled: false
}, prefs => chrome.storage.local.set({
  enabled: !prefs.enabled
})));

/* FAQs & Feedback */
{
  const {management, runtime: {onInstalled, setUninstallURL, getManifest}, storage, tabs} = chrome;
  if (navigator.webdriver !== true) {
    const page = getManifest().homepage_url;
    const {name, version} = getManifest();
    onInstalled.addListener(({reason, previousVersion}) => {
      management.getSelf(({installType}) => installType === 'normal' && storage.local.get({
        'faqs': true,
        'last-update': 0
      }, prefs => {
        if (reason === 'install' || (prefs.faqs && reason === 'update')) {
          const doUpdate = (Date.now() - prefs['last-update']) / 1000 / 60 / 60 / 24 > 45;
          if (doUpdate && previousVersion !== version) {
            tabs.query({active: true, currentWindow: true}, tbs => tabs.create({
              url: page + '?version=' + version + (previousVersion ? '&p=' + previousVersion : '') + '&type=' + reason,
              active: reason === 'install',
              ...(tbs && tbs.length && {index: tbs[0].index + 1})
            }));
            storage.local.set({'last-update': Date.now()});
          }
        }
      }));
    });
    setUninstallURL(page + '?rd=feedback&name=' + encodeURIComponent(name) + '&version=' + version);
  }
}