Examine source code of URL Incrementer - A Next Page Incrementer

{
  "action": {
    "default_title": "__MSG_title__",
    "default_icon": {
      "16": "/app/media/icon.png",
      "24": "/app/media/icon.png",
      "32": "/app/media/icon.png"
    },
    "default_popup": "/app/popup/popup.html"
  },
  "background": {
    "scripts": [
      "/app/background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "url-incrementer@webextensions",
      "strict_min_version": "130.0"
    },
    "gecko_android": {
      "strict_min_version": "130.0"
    }
  },
  "commands": {
    "_execute_browser_action": {},
    "increment": {
      "description": "__MSG_increment_command__"
    },
    "decrement": {
      "description": "__MSG_decrement_command__"
    },
    "next": {
      "description": "__MSG_next_command__"
    },
    "prev": {
      "description": "__MSG_prev_command__"
    },
    "click": {
      "description": "__MSG_click_command__"
    },
    "clear": {
      "description": "__MSG_clear_command__"
    },
    "return": {
      "description": "__MSG_return_command__"
    },
    "pause": {
      "description": "__MSG_pause_command__"
    },
    "options": {
      "description": "__MSG_options_command__"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "/app/content/content.js"
      ]
    }
  ],
  "default_locale": "en",
  "description": "__MSG_description__",
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "/app/media/icon.png",
    "48": "/app/media/icon.png",
    "128": "/app/media/icon.png"
  },
  "manifest_version": 3,
  "name": "__MSG_store_name__",
  "options_page": "/app/options/options.html",
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "short_name": "__MSG_short_name__",
  "version": "7",
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "/shr/picker/picker.html"
      ]
    }
  ]
}