Postman Alternatives for Mozilla Firefox

Postman is not available for Mozilla Firefox but there are a few alternatives with similar functionality. The best Mozilla Firefox alternative is Requestly, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Postman and four of them are available for Mozilla Firefox so hopefully you can find a suitable replacement. Other interesting Mozilla Firefox alternatives to Postman are RESTer, Hubql and Resting.

filter to find the best alternatives

Postman alternatives are mainly API Clients, but if you're looking for HTTP Clients or HTTP(S) Debuggers you can filter on that. Other popular filters include Open Source, Linux, Web Development, Online, Mac, Self-Hosted and Android. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Postman.
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Alternatives list

  1. Requestly icon

    Requestly

     33 likes

    Requestly is a lightweight proxy available as a browser extension & desktop app to intercept & modify network requests. Using Requestly you can Modify Headers, Redirect Url, Mock API response, Delay/Throttle requests, etc.

    37 Requestly alternatives

    Cost / License

    • Freemium
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Microsoft Edge
    • Google Chrome
    • Software as a Service (SaaS)
    • Selenium
    • Firefox
    Modify HTTP Headers
     
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    1
    Requestly vs Postman Comments
    Abhishek Sachan
    Positive
    0

    Requestly = Postman + Charles Proxy.

    Review by a new / low-activity user.
    • Requestly is Freemium and Open SourcePostman is Freemium and Proprietary
    • Requestly is LightweightPostman is not according to our users
  2. RESTer icon

    RESTer

     6 likes

    A REST client for almost any web service (Firefox and Chrome extension).

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Google Chrome
    • Firefox
    RESTer screenshot 1
     
    |
    1
    RESTer vs Postman Comments
    Guest
    Positive
    1

    Amazing interface, integrates very well in Firefox, prettyfies the code… What else?

    Review by a new / low-activity user.
    • RESTer is Free and Open SourcePostman is Freemium and Proprietary
  4. Hubql icon

    Hubql

     1 like

    The collaboration platform for building, documenting and testing APIs together.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Google Chrome
    • Software as a Service (SaaS)
    • Mozilla Firefox
    Hubql screenshot 1
     
  5. Resting icon

    Resting

     Like

    browser web-extension to test and analyze HTTP requests.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Google Chrome
    • Chromium
    • Firefox
    An HTTP request
     
4 of 4 Postman alternatives