TextFlip - ¡uʍop ǝpᴉsdn ʇxǝʇ dᴉlɟ

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "TextFlip - ¡uʍop ǝpᴉsdn ʇxǝʇ dᴉlɟ",
  "short_name": "TextFlip",
  "version": "1.0.4",
  "description": "This extension lets you flip selected text upside down to trick friends!",
  "icons": {
    "16": "img/16.png",
    "32": "img/32.png",
    "48": "img/48.png",
    "64": "img/64.png",
    "128": "img/128.png"
  },
  "browser_action": {
    "default_icon": "img/icon.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "contextMenu.js"
    ]
  }
}