Examine source code of Deadname Remover (Old)

{
  "name": "Deadname Remover",
  "version": "1.2.1",
  "manifest_version": 2,
  "description": "An easy to use Google Chrome plugin to automatically remove and replace deadnames",
  "homepage_url": "https://github.com/WillHayCode/Deadname-Remover",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "popup/options.html"
  },
  "browser_action": {
    "default_icon": "icons/icon19.png",
    "default_title": "Deadname Remover Options",
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "inject.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "old-deadname-remover@meowc.at",
      "strict_min_version": "58.0"
    }
  }
}