Examine source code of Milanote Web Clipper

{
  "manifest_version": 2,
  "name": "Milanote Web Clipper",
  "short_name": "Milanote",
  "description": "Start planning your next great piece of work by collecting inspiration from around the web.",
  "version": "2.3.1",
  "author": "Milanote.com",
  "icons": {
    "16": "resources/icons/icon_16/icon.png",
    "19": "resources/icons/icon_19/icon.png",
    "32": "resources/icons/icon_16/icon@2x.png",
    "38": "resources/icons/icon_19/icon@2x.png",
    "40": "resources/icons/icon_40/icon.png",
    "80": "resources/icons/icon_40/icon@2x.png",
    "128": "resources/icons/icon_128/icon.png",
    "256": "resources/icons/icon_128/icon@2x.png"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "browser_action": {
    "default_title": "Milanote"
  },
  "background": {
    "scripts": [
      "resources/3rdparty/amplitude.min.js",
      "background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "*://app.milanote.com/*",
        "*://staging.milanote.com/*",
        "*://test.milanote.com/*",
        "*://v1.milanote.com/*",
        "*://new.milanote.com/*",
        "*://beta.milanote.com/*",
        "*://localhost/*"
      ],
      "match_about_blank": false,
      "css": [
        "css/pinner.css",
        "css/fonts.css"
      ],
      "js": [
        "pinner.bundle.js",
        "drawer.bundle.js",
        "icon.bundle.js"
      ]
    },
    {
      "matches": [
        "*://app.milanote.com/*",
        "*://staging.milanote.com/*",
        "*://v1.milanote.com/*",
        "*://new.milanote.com/*",
        "*://beta.milanote.com/*",
        "*://test.milanote.com/*"
      ],
      "js": [
        "restricted.bundle.js"
      ]
    }
  ],
  "externally_connectable": {
    "matches": [
      "*://localhost/*",
      "*://app.milanote.com/*",
      "*://staging.milanote.com/*",
      "*://test.milanote.com/*"
    ]
  },
  "permissions": [
    "https://*.milanote.com/",
    "http://*/*",
    "https://*/*",
    "tabs",
    "activeTab",
    "identity",
    "storage",
    "contextMenus"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "web_accessible_resources": [
    "resources/font/*.*",
    "resources/img/*.*",
    "css/drawer.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b2d4c129-6437-4847-868c-53b4832fee00}"
    }
  }
}