Examine source code of Firestore Manager

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.3.3",
  "default_locale": "en",
  "description": "__MSG_extensionDesc__",
  "icons": {
    "128": "assets/images/firestore_logo.png"
  },
  "web_accessible_resources": [
    "assets/images/*.png"
  ],
  "browser_action": {
    "default_icon": "assets/images/firestore_logo.png",
    "default_popup": "index.html?page=manager"
  },
  "options_ui": {
    "page": "index.html?page=options",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "author": "AXeL-dev",
  "homepage_url": "https://github.com/AXeL-dev/firestore-manager",
  "permissions": [
    "storage",
    "tabs",
    "notifications",
    "activeTab"
  ]
}