Examine source code of URest: Enable Right Click & Copy

{
  "manifest_version": 3,
  "name": "Urest",
  "version": "1.1.0",
  "description": "Universal Restoration for the Modern Web. Surgically restores right-click, selection, and copy-paste functionality.",
  "author": "AANKDA LLC",
  "homepage_url": "https://aankda.ai/urest/",
  "permissions": [
    "storage",
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "inject.js"
      ],
      "run_at": "document_start",
      "world": "MAIN",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "urest@surgical.unblock",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}