Apps similar to Firefox Developer Tools include Google Chrome Developer Tools, which is free and open source. Other options are Web Developer, HTTP Debugger, Try It Online (TIO) and DOMScope. You can choose from more than 10 Web Debuggers like Firefox Developer Tools for Windows, Linux, Mac, the web and self-hosting.
Slowy is an OSX app which simulates custom connection's conditions and limits the network traffic. It is created for web developers that work on a local server, to test a website with a real-world connection.
SplineTech JavaScript Debugger is the fastest independent standalone JavaScript Debugger that enables you to debug JavaScript for IE completely independently of any add-ons, plug-ins, Java or any other third-party proprietary tools.
United States
Omnibug is a plugin for the Google Chrome and Mozilla Firefox browsers to ease developing and debugging web metrics implementations. Each outgoing request (sent by the browser) is checked for a pattern; if a match occurs, the URL is displayed and decoded to show the details of...
Test HTML / JavaScript / CSS snippets with real-time preview. You could also add libraries (jQuery, YUI etc.).
The ultimate browser storage manager for developers. Features a JSON tree editor, Cloud Sync for localStorage, sessionStorage, Cookies, IndxedDB and built-in JWT debugging tools.
Bangladesh
Uthrottle is a tool which simulates custom connection’s conditions and limits the network traffic to a specified speed on network interfaces. In complex service oriented application stacks, some bugs only manifest themselves on congested or slow
