Examine source code of Tabby Extension

{
  "manifest_version": 2,
  "name": "Tabby Extension",
  "version": "1.0",
  "description": "Easily add BookMarks to Tabby from your favourite Browser!",
  "homepage_url": "https://github.com/confused-Techie/TabbyFirefoxExtension",
  "icons": {
    "48": "images/tabbyIcon48.png"
  },
  "permissions": [
    "activeTab",
    "https://*/*",
    "http://*/*",
    "storage"
  ],
  "browser_action": {
    "default_icon": "images/tabbyIcon32.png",
    "default_title": "Tabby Extension",
    "default_popup": "extension.html"
  }
}