Examine source code of K-NOW

{
  "manifest_version": 2,
  "name": "K-NOW",
  "version": "1.8.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "knowfirefoxplugin@knowmore.fr",
      "strict_min_version": "59.0a1"
    }
  },
  "default_locale": "en",
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://www.knowmore365.com/extensions/k-now",
  "developer": {
    "name": "Knowmore",
    "url": "https://www.knowmore365.com/"
  },
  "icons": {
    "48": "icons/logo48.png",
    "96": "icons/logo96.png",
    "128": "icons/logo128.png"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true,
    "open_in_tab": true
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "alarms"
  ],
  "background": {
    "scripts": [
      "utils.js",
      "csp.js",
      "background.js"
    ]
  }
}