manifest.json

{
  "manifest_version": 2,
  "name": "UA Shuffler",
  "description": "This extension shuffles trough request heder values.",
  "version": "0.0.1",
  "icons": {
    "16": "/images/shuffle_x16.png",
    "32": "/images/shuffle_x32.png",
    "48": "/images/shuffle_x48.png",
    "128": "/images/shuffle_x128.png"
  },
  "options_page": "options/options.html",
  "browser_action": {
    "default_icon": {
      "16": "/images/shuffle_x16.png",
      "32": "/images/shuffle_x32.png",
      "48": "/images/shuffle_x48.png",
      "128": "/images/shuffle_x128.png"
    },
    "default_title": "UA Shuffler",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": ["background.js"],
    "persistent": true
  },
  "permissions": [
    "tabs",
    "activeTab", 
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}