Examine source code of Notebook Web Clipper

{
  "applications": {
    "gecko": {
      "id": "firefoxaddon@zohonotebook.com",
      "strict_min_version": "58.0"
    }
  },
  "manifest_version": 2,
  "name": "Notebook Web Clipper – Sticky Notes",
  "description": "Clear the clutter. Clip the web. Save to Notebook.",
  "version": "3.1.3",
  "background": {
    "scripts": [
      "dist/clipper-background.bundle.js",
      "vendor/sanitize/sanitize.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "js": [
        "initial-load.js",
        "vendor/readability/Readability.js",
        "vendor/jquery/jquery-3.1.0.min.js",
        "vendor/zoho/annotator/fcomponents_annotator.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "html/*",
    "assets/*",
    "images/*",
    "css/*",
    "js/*",
    "fonts/*",
    "vendor/*"
  ],
  "browser_action": {
    "default_icon": {
      "19": "assets/icons/notebook-icon.png",
      "38": "assets/icons/notebook-icon@2x.png",
      "128": "assets/icons/notebook-128.png"
    }
  },
  "icons": {
    "16": "assets/icons/notebook-icon.png",
    "32": "assets/icons/notebook-icon@2x.png",
    "48": "assets/icons/notebook-128.png",
    "128": "assets/icons/notebook-128.png"
  },
  "default_locale": "en",
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "cookies",
    "http://*/*",
    "https://*/*",
    "contextMenus",
    "unlimitedStorage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}