Examine source code of War Thunder Profiles +

{
  "manifest_version": 3,
  "name": "War Thunder Profiles +",
  "version": "1.0.15",
  "description": "Adds more info the stats page for war thunder player cards.",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://warthunder.com/*"
      ],
      "js": [
        "content_script.js",
        "AVIATION.js",
        "GROUND.js",
        "FLEET.js",
        "veh_rewards.js",
        "compare.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{caed2b56-87db-4e7a-a84f-6a5f3286f538}",
      "strict_min_version": "109.0"
    }
  }
}