Examine source code of ScreenshotCapture

{
  "browser_action": {
    "default_icon": {
      "16": "/icons/dark/16x16.png",
      "19": "/icons/dark/19x19.png",
      "38": "/icons/dark/38x38.png",
      "48": "/icons/dark/48x48.png",
      "128": "/icons/dark/128x128.png"
    },
    "default_title": "Screenshot Capture"
  },
  "background": {
    "scripts": [
      "background/index.js"
    ]
  },
  "commands": {
    "take-screenshot": {
      "description": "Take Screenshot",
      "suggested_key": {
        "default": "Alt+S"
      }
    }
  },
  "description": "Screenshot Capture",
  "icons": {
    "16": "/icons/dark/16x16.png",
    "19": "/icons/dark/19x19.png",
    "38": "/icons/dark/38x38.png",
    "48": "/icons/dark/48x48.png",
    "128": "/icons/dark/128x128.png"
  },
  "manifest_version": 2,
  "name": "Screenshot Capture",
  "options_ui": {
    "page": "/options/index.html",
    "browser_style": false
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "scripting",
    "activeTab",
    "alarms"
  ],
  "version": "1.0.1",
  "web_accessible_resources": [
    "/vendor/Jcrop.gif",
    "/content/pixel.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ashgraham96@proton.me"
    }
  }
}