Examine source code of pCloud Save

{
  "manifest_version": 2,
  "name": "pCloud Save",
  "short_name": "pCloud",
  "version": "1.6.1",
  "author": "pCloud AG - www.pcloud.com",
  "description": "Save your favorite web images, videos, text and more to pCloud - up to 10 GB free storage.",
  "content_security_policy": "script-src 'self' https://appleid.cdn-apple.com https://cdn.safecharge.com; object-src 'self'; media-src 'self'; script-src-elem 'self' https://appleid.cdn-apple.com https://cdn.safecharge.com",
  "icons": {
    "16": "img/context/icon-bitty.png",
    "48": "img/context/icon-small.png",
    "128": "img/context/icon-large.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "img/icon_off_16x16.png",
      "32": "img/icon_off_32x32.png",
      "64": "img/icon_off.png"
    },
    "default_popup": "popup.html"
  },
  "options_page": "options.html",
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "activeTab",
    "contextMenus",
    "notifications",
    "http://*/*",
    "https://*/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "js/jquery-3.2.1.min.js",
      "js/common.js",
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "css/content-style.css"
      ],
      "js": [
        "js/jquery-3.2.1.min.js",
        "js/content-script.js"
      ],
      "match_about_blank": true,
      "all_frames": false,
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "partial/hint-pdf.html",
    "img/partial/icon_on_20x20.png",
    "img/partial/icon_on_20x20@2x.png",
    "img/partial/slim_close.png",
    "img/partial/slim_close@2x.png",
    "img/partial/lightning.png",
    "img/partial/lightning@2x.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{237ead2a-d4b4-4db1-9b50-5350452cabee}"
    }
  }
}