Examine source code of Instagram Unlock

{
  "manifest_version": 2,
  "name": "Instagram Unlock",
  "description": "A simple and lightweight extension to remove modal when scrolling without login on Instagram.",
  "version": "0.0.1",
  "icons": {
    "64": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true
  },
  "page_action": {
    "default_icon": {
      "64": "icons/icon.png"
    },
    "default_title": "Instagram Unlock"
  }
}