Examine source code of Search on Forvo

{
  "manifest_version": 2,
  "name": "Search on Forvo",
  "description": "Search the selected text on Forvo, to get its pronunciations",
  "version": "0.3resigned1",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "author": "峰, code derived from https://github.com/tsl143/tutorials/tree/master/contextMenu",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ba8ef4f7-cc01-48f0-ba7c-f71dea1c920b}"
    }
  }
}