Examine source code of Pinned Instagram

{
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+C"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fcafec72-1f73-4c20-910c-57ca1cd947c4}"
    }
  },
  "description": "Open the pinned Instagram tab. If none is available, a new one will be created.",
  "icons": {
    "48": "img/logo.png",
    "64": "img/logo.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "version": "2.0",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "32": "img/logo.png"
    },
    "default_title": "Pinned",
    "default_area": "navbar"
  },
  "name": "Pinned Instagram"
}