Examine source code of PP Interrupter Lite

{
  "manifest_version": 2,
  "name": "PP Interrupter Lite",
  "version": "0.3",
  "description": "Interrupts web-navigation to specified urls in order to Protect Privacy.",
  "icons": {
    "48": "icons/pp-red_48.png"
  },
  "applications": {
    "gecko": {
      "id": "{972be2a0-5d5c-4368-8122-7915cca63e19}"
    }
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "consts_for_firefox.js",
      "consts.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "icons/pp-red_32.png",
    "default_title": "PP Interrupter Lite"
  }
}