Examine, edit, and debug HTML, CSS, and JavaScript on the desktop and on mobile.

There are many alternatives to Firebug for Mac and since it's discontinued a lot of people are looking for a replacement. The best Mac alternative is Firefox Developer Tools, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Firebug and ten of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Firebug are Google Chrome Developer Tools, Tiny JavaScript Debugger, Omnibug and HttpFox.
Examine, edit, and debug HTML, CSS, and JavaScript on the desktop and on mobile.

The Google Chrome Developer Tools provide an integrated environment for debugging, optimizing, and understanding a web application, or website, running in Google Chrome. The developer tools are developed partly through the WebKit open source project, where the tools are called...



TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavsScript.

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...



HttpFox monitors and analyzes all incoming and outgoing HTTP traffic between the browser and the web servers.


Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

HTTP Headers allows you to quickly see the HTTP header information for the current URL.



The goal of this project is to adds information about the HTTP headers in three ways:

HTTP Scoop is a Mac network sniffer that displays requests to websites along with the response, and makes it fairly easy to see what's going on.

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.


Almost the same functionality as Firebug, with a lot of improvements.