Examine source code of Right-Click Unblocker

{
  "manifest_version": 2,
  "name": "Right-Click Unblocker",
  "version": "1.0",
  "description": "Re-enables the right-click context menu on pages that try to block it.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/icon-64.png",
    "default_title": "Right-Click Unblocker",
    "default_popup": "popup.html"
  },
  "icons": {
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0772bb96-dd4f-4991-a4a0-7c75e31ed096}",
      "strict_min_version": "89.0"
    }
  }
}