Examine source code of IG+VSCO fullsize

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "version": "1.3.4",
  "manifest_version": 2,
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "https://i.instagram.com/api/v1/users/*",
    "https://www.instagram.com/*",
    "https://vsco.co/*",
    "https://www.tiktok.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://vsco.co/*"
      ],
      "js": [
        "content_vsco.js"
      ]
    },
    {
      "matches": [
        "https://www.instagram.com/*"
      ],
      "js": [
        "content_ig.js"
      ],
      "css": [
        "content_ig.css"
      ]
    },
    {
      "matches": [
        "https://www.tiktok.com/*"
      ],
      "js": [
        "content_tiktok.js"
      ]
    }
  ],
  "browser_action": {},
  "icons": {
    "16": "images/logo16.png",
    "32": "images/logo32.png",
    "48": "images/logo48.png",
    "128": "images/logo128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec471f8c-ba4c-4e9f-83dd-4a0d6e5fdeae}"
    }
  }
}