Examine source code of PhishDetect

{
  "version": "2020.10.23",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "manifest_version": 2,
  "name": "PhishDetect",
  "description": "__MSG_manifestDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon@16.png",
    "34": "icons/icon@34.png",
    "48": "icons/icon@48.png",
    "128": "icons/icon@128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_popup": "ui/popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{32e37b7c-894f-47bf-a68b-75f939276910}"
    }
  },
  "options_ui": {
    "page": "ui/options/options.html"
  },
  "background": {
    "scripts": [
      "lib/sha256.min.js",
      "dist/domains.js",
      "js/utils.js",
      "js/const.js",
      "js/indicators.js",
      "js/alerts.js",
      "js/reports.js",
      "js/alarms.js",
      "js/scanHistory.js",
      "js/config.js",
      "js/background.js",
      "js/status.js",
      "js/init.js"
    ]
  },
  "permissions": [
    "alarms",
    "activeTab",
    "tabs",
    "contextMenus",
    "webRequest",
    "webRequestBlocking",
    "history",
    "storage",
    "unlimitedStorage",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "lib/jquery.min.js",
        "lib/sha256.min.js",
        "fontawesome/js/all.js",
        "dist/domains.js",
        "dist/gui.js",
        "js/utils.js",
        "dist/gmail.js"
      ],
      "css": [
        "css/vex.css",
        "css/vex-theme-default.css",
        "css/phishdetect-webmails.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "lib/jquery.min.js",
        "js/utils.js",
        "js/scanPage.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "lib/jquery.min.js",
        "lib/sha256.min.js",
        "dist/domains.js",
        "dist/gui.js",
        "js/utils.js",
        "dist/roundcube.js",
        "js/webmails.js"
      ],
      "css": [
        "css/vex.css",
        "css/vex-theme-default.css",
        "css/phishdetect-webmails.css"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "fontawesome/",
    "ui/warning/warning.html"
  ]
}