Examine source code of GDmod Patcher

{
  "manifest_version": 2,
  "name": "GDMod Patcher",
  "version": "0.1.2",
  "description": "Patches a GDevelop game to let you install mods on them",
  "author": "arthuro555",
  "homepage_url": "https://github.com/arthuro555/gdmod",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "offline_enabled": true,
  "permissions": [
    "<all_urls>",
    "activeTab"
  ],
  "short_name": "GDMod",
  "browser_action": {
    "default_title": "GDMod Patcher",
    "default_popup": "html/popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "js/injector.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "/vendor/localforage.min.js",
    "/js/injected.js",
    "/api/GDApi.js"
  ]
}