Examine source code of Visallo Importer

{
  "version": "2.1.3",
  "manifest_version": 2,
  "default_locale": "en",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "author": "__MSG_companyName__",
  "browser_action": {
    "default_title": "__MSG_toolbarButtonTitle__",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "img/icon-16.png",
      "20": "img/icon-32.png",
      "32": "img/icon-32.png",
      "48": "img/icon-48.png",
      "128": "img/icon-128.png"
    }
  },
  "icons": {
    "16": "img/icon-16.png",
    "20": "img/icon-20.png",
    "32": "img/icon-32.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png"
  },
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "permissions": [
    "contextMenus",
    "pageCapture",
    "storage",
    "tabs",
    "webNavigation",
    "webRequest",
    "<all_urls>"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "windows": "Ctrl+Shift+V",
        "mac": "Command+Shift+V",
        "chromeos": "Ctrl+Shift+V",
        "linux": "Ctrl+Shift+V"
      }
    }
  },
  "content_security_policy": "default-src 'self'; script-src 'self' 'unsafe-eval'; connect-src https://*:* http://*:*; style-src * 'unsafe-inline' 'self' blob:; img-src 'self' data: https://*:*;"
}