Examine source code of StackIt

{
  "manifest_version": 2,
  "name": "StackIt",
  "version": "1.2resigned1",
  "description": "Stack your tabs, don't worry about how many tabs need to save for later. Just Stack It!",
  "homepage_url": "http://dark-arrow.com",
  "permissions": [
    "contextMenus",
    "tabs",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "./background/bgscript.js",
      "./popup/jquery-3.2.1.slim.min.js",
      "./popup/popper.min.js",
      "./popup/bootstrap.min.js"
    ]
  },
  "browser_action": {
    "default_icon": "books.png",
    "default_title": "StackIt",
    "default_popup": "popup/index.html"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "books.png",
    "default_title": "StackIt",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5ede475f-829b-4874-9ce6-3ed7a5f3115a}"
    }
  }
}