Examine source code of WCL Threat Link

{
  "name": "WCL Threat Link",
  "description": "Link Warcraft logs to Classic WoW Threat Graph",
  "version": "1.5",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "*://*.classic.warcraftlogs.com/reports/*"
      ],
      "js": [
        "addButtonClassic.js"
      ]
    },
    {
      "matches": [
        "*://*.vanilla.warcraftlogs.com/reports/*"
      ],
      "js": [
        "addButtonEra.js"
      ]
    },
    {
      "matches": [
        "*://*.fresh.warcraftlogs.com/reports/*"
      ],
      "js": [
        "addButtonFresh.js"
      ]
    },
    {
      "matches": [
        "*://*.sod.warcraftlogs.com/reports/*"
      ],
      "js": [
        "addButtonSod.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9988f2d5-4b83-49e8-9980-922df5ed0750}"
    }
  }
}