Examine source code of moderation

{
  "browser_specific_settings": {
    "gecko": {
      "id": "moderation@rmassidda.it",
      "strict_min_version": "57.0"
    }
  },
  "manifest_version": 2,
  "name": "moderation",
  "version": "0.1.4",
  "permissions": [
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "32": "icons/moderation-32.png",
    "48": "icons/moderation-48.png",
    "128": "icons/moderation-128.png"
  },
  "web_accessible_resources": [
    "blocked.html"
  ],
  "background": {
    "scripts": [
      "moderation.js"
    ]
  }
}