Examine source code of open-PDF

{
  "manifest_version": 2,
  "name": "openPDF",
  "description": "Let's you search google for PDF's easily",
  "version": "1.0.0",
  "icons": {
    "64": "icons/icon.png"
  },
  "browser_action": {
    "default_icon": {
      "64": "icons/icon.png"
    },
    "default_popup": "browserAction/index.html",
    "default_title": "openPDF"
  },
  "page_action": {
    "default_icon": {
      "64": "icons/icon.png"
    },
    "default_popup": "pageAction/index.html",
    "default_title": "openPDF"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{da100106-3edd-4513-8617-adf285b8c6e1}"
    }
  }
}