Examine source code of Bingosync +

{
  "manifest_version": 2,
  "name": "Bingosync+",
  "version": "2.6.3",
  "description": "Provides multiple improvements to Bingosync.com. Notably: Theming, Integrated Timer, Anti-stars, Translation, and more!",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.bingosync.com/room/*",
        "*://*.bingosync.bingothon.com/room/*",
        "*://*.bingo.saesr.events/room/*"
      ],
      "css": [
        "styles/antistar.css",
        "styles/clue.css",
        "styles/invasion.css",
        "styles/timer.css"
      ],
      "js": [
        "scripts/loadLists.js",
        "scripts/antistar.js",
        "scripts/blinddraft.js",
        "scripts/clue.js",
        "scripts/draft.js",
        "scripts/rowcontrol.js",
        "scripts/invasion.js",
        "scripts/ordering.js",
        "scripts/timer.js",
        "scripts/translate.js",
        "scripts/theme.js",
        "scripts/boardFunctions.js",
        "libraries/dom-to-img.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "assets/antistar.png"
  ],
  "page_action": {
    "default_title": "Bingosync+",
    "default_popup": "pageAction/action.html",
    "default_icon": "icons/icon-48.png",
    "show_matches": [
      "*://*.bingosync.com/room/*",
      "*://*.bingosync.bingothon.com/room/*",
      "*://*.bingo.saesr.events/room/*"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "https://raw.githubusercontent.com/*",
    "clipboardWrite"
  ],
  "options_ui": {
    "open_in_tab": true,
    "page": "options/page.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4aaad12f-b540-4818-85be-f1a53f641015}"
    }
  }
}