Examine source code of SuperGlue

{
  "manifest_version": 2,
  "name": "SuperGlue",
  "description": "This is the SuperGlue browser add-on to create and modify web content stored on a SuperGlue server",
  "author": "The SuperGlue Team (2014). www.superglue.it",
  "version": "1.0.2",
  "icons": {
    "16": "logo-16.png",
    "48": "logo-48.png",
    "128": "logo-128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>",
    "clipboardRead",
    "clipboardWrite"
  ],
  "web_accessible_resources": [
    "*"
  ],
  "browser_action": {
    "default_icon": {
      "19": "icon-19.png",
      "38": "icon-38.png"
    },
    "default_title": "SuperGlue"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6dfc9711-f230-4cc2-ab02-78a999b0caa4}"
    }
  }
}