Examine source code of DivPic

{
  "manifest_version": 3,
  "name": "DivPic",
  "version": "3.2",
  "description": "Capture screenshots of HTML elements with ease. Select any element on the webpage and save or copy the screenshot instantly.",
  "author": "Ragul Sundaram",
  "homepage_url": "https://github.com/Ragulsundaram/DivPic",
  "permissions": [
    "activeTab",
    "downloads",
    "notifications",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "divpic@ragulsundaram.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "commands": {
    "start-selection": {
      "suggested_key": {
        "mac": "Command+Shift+E",
        "default": "Ctrl+Shift+E"
      },
      "description": "Start element selection"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "default_locale": "en"
}