Examine source code of LTD2 Translation Tool

{
  "name": "LTD2 Translation Tool",
  "manifest_version": 3,
  "version": "1.10.0",
  "description": "Adds to GoogleSheets in Firefox an in-game preview of translation strings for LegionTD2",
  "author": "Kidev",
  "homepage_url": "https://github.com/Kidev/LTD2_TranslationTool",
  "browser_specific_settings": {
    "gecko": {
      "id": "ltd2_translator_tool@addons.firefox.kidev.org"
    }
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon-48.png"
  },
  "action": {
    "default_title": "Toggle Translation Tool",
    "default_icon": "icon-48.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "inject.css",
        "inject.js",
        "icon-48.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}