Examine source code of Auto Currency Converter

{
  "name": "Auto Currency Converter",
  "short_name": "FCC",
  "permissions": [
    "https://gp.bestprice.gr/get"
  ],
  "description": "Automatically convert in-page prices to the selected currency using current rates.",
  "version": "1",
  "author": "UVSTAR",
  "commands": {
    "toggle": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "MacCtrl+Shift+C"
      },
      "description": "Toggle FCC conversion"
    },
    "rates": {
      "suggested_key": {
        "default": "Ctrl+Shift+T",
        "mac": "MacCtrl+Shift+T"
      },
      "description": "Current rates"
    }
  },
  "manifest_version": 2,
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": false,
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "js": [
        "dist/script.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "html/options.html"
  },
  "web_accessible_resources": [
    "html/test.html",
    "html/*",
    "assets/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "assets/browser-action/16.png",
      "24": "assets/browser-action/24.png",
      "32": "assets/browser-action/32.png"
    },
    "default_title": "Auto Currency Converter",
    "default_popup": "html/popup.html"
  },
  "icons": {
    "16": "assets/icon/16.png",
    "48": "assets/icon/48.png",
    "128": "assets/icon/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3a5cfcdb-68ce-4cb6-a1b6-652eccc9c982}"
    }
  }
}