Examine source code of InstaControls

{
  "manifest_version": 2,
  "name": "Insta controls",
  "version": "1.0",
  "description": "Full Instagram video management added",
  "icons": {
    "128": "img/128x128.png"
  },
  "browser_action": {
    "default_icon": {
      "128": "img/128x128.png"
    },
    "default_title": "Control your Instagram videos"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7cbbd7e0-27bc-4c8e-bfe5-d60bef460964}"
    }
  }
}