Firefox Developer Tools VS Cocoa Rest Client

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

A free open source, native Apple OS X app for testing HTTP/REST endpoints

Cross-Platform Consistency
Firefox Developer Tools provide a consistent debugging experience across various platforms (Windows, macOS, Linux), making it easier for developers to switch between environments without having to adapt to new tools.
Responsive Design Mode
It allows developers to test and optimize their websites for different screen sizes and resolutions by simulating different devices, helping ensure a better user experience across different devices.
Memory and Performance Analysis
Integrated tools for analyzing memory consumption, performance bottlenecks, and storage usage enable developers to optimize web applications to run smoothly and efficiently.
JavaScript Debugging
Offers powerful JavaScript debugging with breakpoints, watch expressions, and a console for testing code, simplifying the process of identifying and fixing issues in scripts.
CSS Grid and Flexbox Inspector
Specialized tools for inspecting and debugging CSS Grid and Flexbox layouts help developers visualize alignment, distribution of space, and manage layout intricacies.

Performance Overhead
Running Developer Tools can sometimes consume significant system resources, potentially slowing down browser performance, especially on less powerful hardware.
Limited Extensions
Compared to other popular browsers like Chrome, Firefox has a smaller selection of third-party extensions and add-ons that enhance development capabilities, which might limit customization.
Market Share
As Firefox has a smaller share of the browser market compared to competitors like Chrome, compatibility testing on Firefox Developer Tools could be less representative of the general user experience.
Learning Curve
For developers accustomed to other browser tools, the layout and specific functionalities of Firefox Developer Tools might require time to learn and adapt to effectively utilize them.
Intermittent Stability Issues
Occasionally, developers might experience stability issues such as crashes or unexpected behavior, although these instances are typically resolved in subsequent updates.