manifest.json

{
  "name": "Class Tools",
  "version": "0.0.4",
  "description": "Tools for your classroom",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "storage",
    "declarativeContent",
    "contextMenus"
  ],
  "page_action": {
    "default_popup": "src/popup.html",
  "default_icon": {
      "16": "images/wolf-16.png",
      "32": "images/wolf-32.png",
      "48": "images/wolf-48.png",
      "64": "images/wolf-64.png",
      "128": "images/wolf-128.png",
      "256": "images/wolf-256.png",
      "512": "images/wolf-512.png",
      "1024": "images/wolf-1024.png"
    }
  },
  "icons": {
      "16": "images/wolf-16.png",
      "32": "images/wolf-32.png",
      "48": "images/wolf-48.png",
      "64": "images/wolf-64.png",
      "128": "images/wolf-128.png",
      "256": "images/wolf-256.png",
      "512": "images/wolf-512.png",
      "1024": "images/wolf-1024.png"
    },
  "background": {
    "scripts": [
      "src/main.js"
    ],
    "persistent": true
  }
}