Examine source code of Screenshot Master

{
  "manifest_version": 2,
  "name": "Screenshot Master",
  "version": "3.7.6",
  "description": "Advanced screenshot tool with annotation, editing, and cloud upload",
  "homepage_url": "https://example.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "screenshot-master-0cemepbm@firefox.extension",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "sessions",
    "storage",
    "unlimitedStorage",
    "<all_urls>",
    "bookmarks",
    "history",
    "notifications",
    "webRequest",
    "webRequestBlocking",
    "contextMenus"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "Screenshot Master",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js",
      "lib/utils.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      }
    },
    "quick-action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Q"
      },
      "description": "Quick action"
    }
  }
}