Examine source code of Trainers Web Plus

{
  "manifest_version": 2,
  "name": "Trainers Web Plus",
  "description": "Trainers Web Plus enhances user experience for Pokémon TCG Asia website.",
  "version": "0.2.3",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "*://asia.pokemon-card.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "trainers-web-plus@peioris.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Trainers Web Plus Dashboard",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://asia.pokemon-card.com/*/deck-build/*"
      ],
      "exclude_matches": [
        "*://asia.pokemon-card.com/*/deck-build/code/*",
        "*://asia.pokemon-card.com/*/deck-build/recipe/*"
      ],
      "run_at": "document_idle",
      "css": [
        "content-scripts/deck-build.css"
      ],
      "js": [
        "content-scripts/deck-build.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "*://asia.pokemon-card.com/*/event-search/*"
      ],
      "exclude_matches": [
        "*://asia.pokemon-card.com/*/event-search/search/*"
      ],
      "run_at": "document_idle",
      "css": [
        "content-scripts/event-detail.css"
      ],
      "js": [
        "content-scripts/event-detail.js"
      ]
    },
    {
      "matches": [
        "*://asia.pokemon-card.com/*/event-search/search/*"
      ],
      "run_at": "document_idle",
      "css": [
        "content-scripts/event-search.css"
      ],
      "js": [
        "content-scripts/event-search.js"
      ]
    },
    {
      "matches": [
        "*://asia.pokemon-card.com/*/mypage/",
        "*://asia.pokemon-card.com/*/mypage/*"
      ],
      "run_at": "document_idle",
      "css": [
        "content-scripts/my-page.css"
      ],
      "js": [
        "content-scripts/my-page.js"
      ]
    }
  ]
}