Examine source code of Crafty Sync for Firefox

{
  "applications": {
    "gecko": {
      "id": "feedback@craftyapps.co",
      "strict_min_version": "47.0a1"
    }
  },
  "browser_action": {
    "default_title": "Crafty Sync for Firefox",
    "default_icon": {
      "32": "icons/32.png"
    },
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "storage",
    "bookmarks",
    "tabs",
    "*://*.eloguent.com/*",
    "webRequest",
    "webNavigation"
  ],
  "description": "Sync your open tabs, bookmarks and history with your iPhone/iPad.",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "homepage_url": "http://www.craftyapps.co",
  "manifest_version": 2,
  "name": "Crafty Firefox Sync",
  "version": "1.2resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}