Examine source code of Feather Web Clipper

{
  "manifest_version": 3,
  "name": "Feather Web Clipper",
  "version": "1.0.6",
  "description": "Capture the current web page as Markdown and send it to Feather.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "contextMenus",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_page": "options.html",
  "commands": {
    "send-page": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      },
      "description": "Send current page to Feather"
    },
    "save-link": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "Save current page link to Feather inbox"
    },
    "send-selection-to-scratchpad": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Send selection to a Feather scratchpad"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "feather@ventana.tools",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}