Examine source code of SnapIt

{
  "manifest_version": 2,
  "name": "SnapIt",
  "version": "1.0",
  "description": "Takes a screenshot of the entire webpage from the top navbar to the bottom footer.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "camera.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "screenshot-stitcher.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3bfaf70b-2470-4bf7-a6ca-c9a7c9b35ab2}"
    }
  }
}