Examine source code of Ocel | Converter Crypto

{
  "description": "Adds new divs for converting crypto amount into currency.",
  "manifest_version": 2,
  "name": "Ocel | Converter Crypto",
  "version": "1.2.0",
  "icons": {
    "32": "icons/32.png"
  },
  "permissions": [
    "storage",
    "https://ocel.pt/*"
  ],
  "browser_action": {
    "default_icon": "icons/48.png",
    "theme_icons": [
      {
        "light": "icons/32.png",
        "dark": "icons/32.png",
        "size": 32
      }
    ],
    "default_title": "Ocel",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://ocel.pt/*"
      ],
      "js": [
        "foreground.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  }
}