Key benefits
- No proxy setup required – Works entirely within the browser.
- Quick debugging – Instantly view, rewrite, or mock API requests.
- Cross-browser support – Available for Chrome, Firefox, Edge, and more.
- Secure and isolated – Only affects traffic in the browser you install it on.
When to use the browser extension
Use the browser extension if:- You only need to intercept traffic from websites or web apps.
- You’re testing frontend behavior and want a quick setup.
- You want to create rules to mock APIs, rewrite URLs, inject scripts, or modify headers.
How to intercept traffic using the extension
Once the browser extension is installed, you can start intercepting traffic with just a few clicks. Follow the Browser Interception guide to get started → This guide walks you through launching a connected browser, viewing traffic in the network table, and verifying the proxy setup. Requestly’s Browser Extension is a lightweight interceptor that runs directly in your browser. It allows you to intercept, modify, and control both incoming responses and outgoing requests, making it a powerful tool for developers and testers.Browser extension features
With the browser extension, you can:- Modify requests – Change headers, query parameters, or request methods before they’re sent.
- Mock responses – Return custom JSON or status codes instead of hitting the real server.
- Redirect traffic – Route API calls to staging or mock URLs for flexible testing.
- Injectscripts/styles – Add custom JavaScript or CSS into pages on the fly.
Supported Browsers & Profiles
Requestly supports all modern browsers, and you can use it with many browsers like Google Chrome, Firefox, and Safari. Here’s a breakdown of the browser support:- Chromium-Based Browsers Requestly is available on all Chrome-based browsers through the Chrome Web Store. This includes Google Chrome, Microsoft Edge, Brave, Opera, and others.
- Firefox We officially support Firefox, ensuring a seamless experience for Firefox browser.
- Safari (API Client Only) The Requestly extension is available for Safari, but currently, it only supports the API Client. Support for HTTP rules will be available soon.