Examine source code of Quick Asana

{
  "manifest_version": 2,
  "name": "Quick Asana",
  "version": "0.2",
  "icons": {
    "16": "icons/idle-16.png",
    "48": "icons/idle-48.png",
    "64": "icons/idle-64.png",
    "128": "icons/idle-128.png",
    "256": "icons/idle-256.png"
  },
  "permissions": [
    "clipboardRead",
    "notifications",
    "storage",
    "unlimitedStorage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/idle-16.png",
      "48": "icons/idle-48.png",
      "64": "icons/idle-64.png",
      "128": "icons/idle-128.png",
      "256": "icons/idle-256.png"
    },
    "default_title": "Quick Asana"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{073d8528-4b24-11ed-9b73-c71d3da4ab37}"
    }
  }
}