Examine source code of Github1s button

{
  "manifest_version": 2,
  "name": "Github1s",
  "version": "1.0.0",
  "description": "This is a simple extension that makes it easy to jump back and forth between github1s and github.",
  "author": "GHOST#7524 | github.com/ghostdevv",
  "browser_action": {
    "default_title": "Github1s Chrome extension"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "icons": {
    "16": "icons/16-disabled.png",
    "32": "icons/32-disabled.png",
    "64": "icons/64-disabled.png",
    "128": "icons/128-disabled.png"
  },
  "permissions": [
    "tabs"
  ]
}