Examine source code of Kanbanize

{
  "manifest_version": 2,
  "name": "Kanbanize",
  "version": "1.4resigned1",
  "description": "This addon allows you to add cards to any of the boards that you are assigned to with just a few clicks, without having to explicitly open them!",
  "icons": {
    "16": "icons/kanbanize-logo-16.png",
    "32": "icons/kanbanize-logo-32.png",
    "48": "icons/kanbanize-logo-48.png",
    "64": "icons/kanbanize-logo-64.png",
    "96": "icons/kanbanize-logo-96.png",
    "128": "icons/kanbanize-logo-128.png"
  },
  "applications": {
    "gecko": {
      "id": "kanbanizeAddon@kanbanize.com",
      "strict_min_version": "48.0"
    }
  },
  "permissions": [
    "https://*.kanbanize.com/index.php/api/kanbanize/*",
    "storage",
    "contextMenus",
    "notifications",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/kanbanize-logo-32.png"
    },
    "default_title": "Kanbanize",
    "default_popup": "login-page.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  }
}