Requestly VS Firefox Developer Tools

Compare Requestly VS Firefox Developer Tools and see what are their differences

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Requestly

A Powerful API Mocking and Testing Tool

Firefox Developer Tools

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

Requestly //
2025-02-12
Rest Client //
2025-02-12
HTTP Interceptor //
2025-02-12
API Mocking //
2025-02-12
Requestly //
2025-02-12

Requestly is a modern and powerful companion for API Development and Testing. It is an open-source tool purpose-built to speed up and simplify API development workflow for developers and QAs. It is a combination of API Client and HTTP Interceptor that helps create and share API Contracts, testing APIs, and easily mock and integrate them into web and mobile apps.

Landing page //
2022-01-30

Requestly

Website: requestly.com
Pricing URL: Official Requestly Pricing
$ Details: freemium
Platforms: Google Chrome Firefox Edge Safari Brave Opera Vivaldi Android Windows Linux Mac OSX MacOS
Release Date: 2021 January
Startup details
Country: United States
State: California
City: San Francisco
Founder(s): Sachin Jain, Sagar Soni, Sahil Gupta
Employees: 20 - 49

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Firefox Developer Tools

Website: developer.mozilla.org
Pricing URL: -
$ Details: -
Platforms: -
Release Date: -

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Requestly features and specs

Redirect URL
Block Network Requests
Modify Request & Response Header
Modify Response
Supercharge Selenium
Session Replay
Modify Query Params
Team Workspace
API Client
API Mocks
GraphQL Support
Zero Setup
Auto Capture Sessions
Network Logs
Console Logs

Firefox Developer Tools features and specs

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.

Possible disadvantages of Firefox Developer Tools

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.

Analysis of Requestly

Overall verdict

Requestly is generally regarded as a good tool due to its comprehensive functionalities and ease of use. Its ability to seamlessly manage network requests makes it suitable for both beginners and experienced developers.

Why this product is good

Requestly is widely considered a valuable tool because it offers robust and flexible features for intercepting and modifying network requests. Developers and QA testers appreciate it for its ability to simulate and debug API calls efficiently. It is particularly useful for testing changes without altering the codebase and for working with web applications in development and production environments.

Recommended for

Developers looking to debug and test API endpoints.
Quality Assurance (QA) teams that require reliable testing tools for web applications.
Technical professionals who manage network traffic and need to modify or redirect requests effortlessly.
Anyone involved in web development who needs to simulate network conditions or test application behavior under different scenarios.

Requestly videos

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Get Started with Requestly

Firefox Developer Tools videos

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14 Firefox Developer Tools You Might Not Know About

Category Popularity

0-100% (relative to Requestly and Firefox Developer Tools)

Requestly

Firefox Developer Tools

Developer Tools

89 89%

Developer Tools

11% 11

Testing

100 100%

Testing

0% 0

Programming

0 0%

Programming

100% 100

APIs

100 100%

APIs

0% 0

Questions & Answers

As answered by people managing Requestly and Firefox Developer Tools.

Who are some of the biggest customers of your product?

Requestly's answer

Verizon
AT&T
Adobe
Salesforce
Telegraph
Intuit
Verizon

How would you describe the primary audience of your product?

Requestly's answer

Front-end developers, QAs, PMs, Digital Marketers

What makes your product unique?

Requestly's answer

Requestly is an open-source API development and testing tool that combines the capabilities of an API Client and HTTP Interceptor, making it a better alternative to Postman + Charles Proxy. It simplifies API mocking, request modification, and debugging with an intuitive no-code interface, enabling developers and QAs to test APIs efficiently.

User comments

Share your experience with using Requestly and Firefox Developer Tools. For example, how are they different and which one is better?

Reviews

These are some of the external sources and on-site user reviews we've used to compare Requestly and Firefox Developer Tools

Requestly Reviews

Comparing Charles Proxy, Fiddler, Wireshark, and Requestly

On the pricing front, Requestly strikes a balance between affordability and functionality. It is an open-source tool, offering freemium to individual developers and affordable pricing plans for team collaboration. We have also clearly differentiated how Requestly differs from Wireshark and other web debugging tools like Proxyman, Modheader, and HTTP ToolKit separately.

Source: dev.to

Firefox Developer Tools Reviews

We have no reviews of Firefox Developer Tools yet.
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Social recommendations and mentions

Based on our record, Requestly seems to be more popular. It has been mentiond 35 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Requestly mentions (35)

Why You Need a Local-First API Client (With Hands-On Example)
If you want to try a local-first workflow, you can start using Requestly here: https://requestly.com. - Source: dev.to / 9 months ago
How to use Cursor to Generate API Testcases in Requestly
That’s where automation changes the game. By pairing Cursor, an AI-powered coding assistant, with Requestly's local-first API testing and mocking platform, you can offload the grunt work of writing tests to AI while keeping execution secure and reproducible on your own system. In this article, we’ll walk through how to set up Cursor with Requestly, generate test cases automatically, and run them end-to-end so that... - Source: dev.to / 9 months ago
These 20 Awesome API Clients Will Change How You Work with APIs
Requestly is a versatile browser extension and web client used to intercept, mock, and debug APIs in real-time—perfect for frontend developers. - Source: dev.to / about 1 year ago
Best Tools for GraphQL Development in 2025
Requestly is a powerful tool for modifying GraphQL responses, intercepting requests, and debugging API interactions. It allows developers to tweak request bodies, capture GraphQL traffic, and share sessions for easier debugging and collaboration. - Source: dev.to / over 1 year ago
How Not to Use AI in Software Development
Learn more at https://requestly.com/. - Source: dev.to / over 1 year ago