Examine source code of Easy Screenshot Plus

{
  "browser_specific_settings": {
    "gecko": {
      "id": "easy-screenshot-plus@quietmindcreative.com",
      "strict_min_version": "137.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "page": "background/page.html"
  },
  "browser_action": {
    "browser_style": true,
    "default_area": "navbar",
    "default_icon": {
      "16": "icons/browser_action-dark.svg",
      "32": "icons/browser_action-dark.svg",
      "64": "icons/browser_action-dark.svg"
    },
    "default_title": "__MSG_browserActionTitle__",
    "theme_icons": [
      {
        "light": "icons/browser_action-light.svg",
        "dark": "icons/browser_action-dark.svg",
        "size": 16
      },
      {
        "light": "icons/browser_action-light.svg",
        "dark": "icons/browser_action-dark.svg",
        "size": 32
      }
    ]
  },
  "commands": {
    "ess-menu": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description": "__MSG_command_showMenu__"
    },
    "ess-entire": {
      "suggested_key": {
        "default": "Ctrl+Shift+S"
      },
      "description": "__MSG_action_entire__"
    },
    "ess-visible": {
      "description": "__MSG_action_visible__"
    },
    "ess-select": {
      "description": "__MSG_action_select__"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*",
        "file:///*"
      ],
      "css": [
        "common/style.css"
      ],
      "js": [
        "common/script.js",
        "content/script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "default_locale": "en_US",
  "description": "__MSG_extensionDescription__",
  "author": "Quiet Mind Creative",
  "homepage_url": "https://github.com/thequietmind/easyscreenshotplus",
  "icons": {
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png"
  },
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "options_ui": {
    "browser_style": true,
    "open_in_tab": false,
    "page": "options/page.html"
  },
  "permissions": [
    "<all_urls>",
    "clipboardWrite",
    "downloads",
    "menus",
    "notifications",
    "storage"
  ],
  "version": "1.2.0"
}