Examine source code of quicksave.io

{
  "manifest_version": 2,
  "name": "quicksave.io",
  "version": "0.2resigned1",
  "author": "Aleksander Gajewski",
  "description": "quicksave.io - Firefox Add-on",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "128": "icon128.png",
    "512": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "quicksave.io"
  },
  "permissions": [
    "*://*.quicksave.io/",
    "tabs",
    "cookies",
    "contextMenus",
    "notifications",
    "storage"
  ],
  "background": {
    "scripts": [
      "env.js",
      "shared/ConsoleLog.js",
      "shared/Request.js",
      "shared/API.js",
      "plugin.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd51b451-8b17-48d6-9adb-ccb11aae86b3}"
    }
  }
}