Examine source code of Counter Button Pro

{
  "name": "__MSG_extNameFull__",
  "short_name": "__MSG_extName__",
  "version": "0.1.0",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "icons": {
    "16": "res/icons/logo/logo_16.png",
    "32": "res/icons/logo/logo_32.png",
    "48": "res/icons/logo/logo_48.png",
    "128": "res/icons/logo/logo_128.png"
  },
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "author": "Oziku Technologies LLC",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "html/options.html"
  },
  "browser_action": {
    "default_title": "__MSG_extName__",
    "default_icon": {
      "16": "res/icons/logo/logo_16.png",
      "32": "res/icons/logo/logo_32.png",
      "48": "res/icons/logo/logo_48.png",
      "128": "res/icons/logo/logo_128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5dcb5cb4-e392-40f3-a8ac-d93d38565f78}"
    }
  }
}