Examine source code of RightClickOnInstagram

{
  "description": "Enables right-click interaction with story and post images on instagram.com. Icon made by Freepik from www.flaticon.com",
  "manifest_version": 2,
  "name": "RightClickOnInstagram",
  "version": "1.0",
  "homepage_url": "https://github.com/kforth/RightClickOnInstagram",
  "icons": {
    "32": "icons/right-click-32.png",
    "64": "icons/right-click-64.png",
    "128": "icons/right-click-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "src/enable-right-click.js"
      ]
    }
  ]
}