Examine source code of WaifuChain

{
  "name": "WaifuChain",
  "version": "1.0.1resigned1",
  "description": "Display waifus associated with social media profiles",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png"
    },
    "default_title": "WaifuChain",
    "default_popup": "popup/index.html"
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "js": [
        "dist/twitter.js"
      ],
      "css": [
        "contentScripts/twitter/styles.css"
      ]
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d66a0f0d-1aa2-4464-80c3-dbb8d41b352a}"
    }
  }
}