Examine source code of REtoUN

{
  "manifest_version": 2,
  "name": "REtoUN",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{d40ec1bd-9875-4dbd-a1f7-cba6e2d9d281}",
      "strict_min_version": "100.0"
    }
  },
  "description": "Adds an option to the context menu to open links to Reddit comments on unddit.com in a new tab",
  "background": {
    "scripts": [
      "REtoUN.js"
    ],
    "persistent": false
  },
  "permissions": [
    "contextMenus",
    "tabs"
  ],
  "icons": {
    "48": "icons/REtoUN_icon-48.png",
    "96": "icons/REtoUN_icon-96.png"
  }
}