Examine source code of Pig-Elvish

{
  "description": "Translate the current tab to Pig-Elvish",
  "name": "Pig-Elvish",
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "19": "icons/png/elf19.png",
      "38": "icons/png/elf38.png"
    },
    "default_title": "Pig-elvish this page"
  },
  "web_accessible_resources": [
    "icons/elf_attribution"
  ],
  "version": "1.1.5",
  "homepage_url": "https://github.com/jbaber/pig-elvish-extension",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icons/png/elf48.png",
    "96": "icons/png/elf96.png"
  }
}