Examine source code of Image Editor Pro

{
  "manifest_version": 2,
  "name": "Image Editor Pro",
  "short_name": "Image Editor",
  "version": "1.2.0",
  "description": "Right-click or use Ctrl+Q on any image to open it in an advanced image editor with brightness, contrast, exposure controls and keyboard shortcuts",
  "permissions": [
    "contextMenus",
    "tabs",
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "tool.html",
    "tool.js",
    "tool.css",
    "options.html",
    "options.js",
    "icons/*.png",
    "icons/*.svg"
  ],
  "browser_action": {
    "default_title": "Image Editor Settings",
    "default_popup": "options.html"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "icons": {
    "16": "icons/edit-16.svg",
    "32": "icons/edit-32.svg",
    "48": "icons/edit-48.svg",
    "96": "icons/edit-48.svg"
  },
  "commands": {
    "edit-current-image": {
      "suggested_key": {
        "default": "Ctrl+Q",
        "mac": "Command+Q"
      },
      "description": "Edit current or largest visible image"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "image-editor@example.com",
      "strict_min_version": "58.0"
    }
  }
}