Examine source code of RealEnsight

{
  "name": "RealEnsight",
  "description": "Discuss properties by clicking from Redfin and Zillow.",
  "version": "0.0.0.1",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://*.redfin.com/*"
      ],
      "js": [
        "content_redfin.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end",
      "all_frames": false,
      "match_about_blank": true
    },
    {
      "matches": [
        "https://*.zillow.com/*"
      ],
      "js": [
        "content_zillow.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_start",
      "all_frames": false,
      "match_about_blank": true
    }
  ],
  "icons": {
    "16": "/images/re_icon_16.png",
    "32": "/images/re_icon_32.png",
    "48": "/images/re_icon_48.png",
    "128": "/images/re_icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e813257-16fb-488b-9c06-9babc5228888}"
    }
  }
}