Examine source code of AWBW Damage Calculator +

{
  "manifest_version": 3,
  "name": "AWBW Damage Calculator +",
  "description": "Upgraded damage calculator for AWBW. Compare multiple attacks side-by-side and view sequential attacks for breakthrough calcs.",
  "version": "1.3.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "awbw.damage.calculator.plus@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "images/icon_16.png",
    "32": "images/icon_32.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png"
  },
  "content_scripts": [
    {
      "js": [
        "scripts/calc_plus.js"
      ],
      "matches": [
        "https://awbw.amarriner.com/*"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*",
        "scripts/calc_plus.css"
      ],
      "matches": [
        "https://awbw.amarriner.com/*"
      ]
    }
  ]
}