Examine source code of tlimit

{
  "manifest_version": 2,
  "version": "0.9resigned1",
  "name": "tlimit",
  "background": {
    "scripts": [
      "tlimit.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/tlimit-32.png",
    "default_title": "tlimit",
    "default_popup": "popup/tlimit.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7d994412-c185-4865-aa76-ef4b80ed2e51}"
    }
  }
}