Examine source code of GitHub Downloads

{
  "manifest_version" : 2 ,
  "name" : "GitHub Downloads",
  "version" : "1.1.1",
  "description" : "See the number of downloads next to releases on GitHub",
  "author": "Samuel Meuli",
  "homepage_url" : "https://github.com/samuelmeuli/activity-hub",
  "permissions" : [
    "*://api.github.com/repos/*" 
  ],
  "icons" : {
    "48" : "./icons/icon-48.png",
    "128" : "./icons/icon-128.png",
    "512" : "./icons/icon-512.png",
    "1024" : "./icons/icon-1024.png"
  },
  "content_scripts" : [
    {
      "matches" : [
        "*://*.github.com/*/releases*" 
      ],
      "js" : [
        "./main.js" 
      ]
    }
  ]
}