Examine source code of quicksnap

{
  "manifest_version": 3,
  "name": "quicksnap",
  "description": "screenshots - from the screen, straight to your clipboard.",
  "version": "1.0.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "quicksnap@bucks.gg",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_icon": {
      "16": "icon/16x16.png",
      "48": "icon/48x48.png",
      "128": "icon/128x128.png"
    },
    "default_title": "Take Screenshot"
  },
  "externally_connectable": {
    "matches": [
      "*://*.work.ink/*",
      "*://work.ink/*"
    ]
  },
  "permissions": [
    "storage",
    "management",
    "scripting",
    "activeTab"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "camera.mp3"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "inject.js"
      ]
    },
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "inject2.js"
      ],
      "run_at": "document_start"
    }
  ],
  "author": "contact@bucks.gg"
}