Examine source code of SFSE Up Votes

{
  "manifest_version": 2,
  "name": "SFSE Up Votes",
  "version": "0.2resigned1",
  "description": "Displays the total number of up votes Salesforce Stackexchange users have made in their user details section.",
  "content_scripts": [
    {
      "matches": [
        "*://*.salesforce.stackexchange.com/*"
      ],
      "js": [
        "sfseupvotes.js"
      ]
    }
  ],
  "icons": {
    "16": "images/triangle16.png",
    "24": "images/triangle24.png",
    "32": "images/triangle32.png",
    "48": "images/triangle48.png",
    "64": "images/triangle64.png",
    "72": "images/triangle72.png",
    "96": "images/triangle96.png",
    "128": "images/triangle128.png",
    "256": "images/triangle256.png"
  },
  "permissions": [
    "*://sfseupvotes.herokuapp.com/*"
  ],
  "homepage_url": "https://sfseupvotes.herokuapp.com/",
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9780f0c-75d1-4750-92f1-66200117743f}"
    }
  }
}