Examine source code of Time = Money

{
  "manifest_version": 2,
  "name": "Time = Money",
  "description": "Replace all prices with the time you need to work to earn that much. Find real value of stuff you buy!",
  "version": "0.0.0.1",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "glue.js",
        "options_util.js",
        "script.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{07d7af12-7016-493c-a3f0-e804fc7ffde6}"
    }
  },
  "icons": {
    "128": "icon_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}