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Editors' Review · October 21, 2026

Powerful Browser for Web Developers

Mozilla Firefox Developer Edition is a specialized version of the popular Firefox browser tailored for web developers. This free program for Mac offers advanced tools and features that streamline the web development process. It includes a dedicated set of developer tools that allow for real-time editing of CSS, HTML, and JavaScript, making debugging and testing more efficient. Additionally, it supports various web technologies and provides a built-in responsive design mode to test applications on different screen sizes easily.

With a focus on performance, Firefox Developer Edition includes features like a CSS Grid layout, an enhanced JavaScript debugger, and a network monitor for tracking requests and responses. The browser also integrates seamlessly with other tools such as Firefox Sync, allowing developers to access their bookmarks, history, and open tabs across devices. Its strong privacy features ensure a secure browsing experience, setting it apart from other browsers in the market.

Technical

Title
Mozilla Firefox Developer Edition 144.0b9 for Mac
Requirements
macOS 10.15
License
Free
Latest update
Author
Mozilla

Program available in other languages



Changelog

We don’t have any change log information yet for version 144.0b9 of Mozilla Firefox Developer Edition. Sometimes publishers take a little while to make this information available, so please check back in a few days to see if it has been updated.

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