Examine source code of Quickly capture

{
  "manifest_version": 2,
  "name": "Awesome Screenshot",
  "version": "1.0.0",
  "description": "Quickly capture the visible tab or a selected area, annotate (pen, rectangle, text), and download as PNG.",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "downloads",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Awesome Screenshot",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "editor.html",
    "editor.css",
    "editor.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "select.js"
      ],
      "css": [
        "select.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5a96f3ff-def2-47f5-87ec-91ef732d2880}"
    }
  }
}