Firefox Developer Experience

  • CDP Retirement in Firefox

    CDP Retirement in Firefox

    Julian Descottes

    2025-06-02
    Remote Protocols, WebDriver BiDi

    Firefox support for CDP is officially removed starting with Firefox 141.

  • Firefox WebDriver Newsletter 139

    Firefox WebDriver Newsletter 139

    Henrik Skupin

    2025-05-27
    Release Notes, Remote Protocols, WebDriver BiDi, WebDriver Classic

    Allow to override the Geolocation per browsing context and user context, and bug fixes.

  • Firefox WebDriver Newsletter 138

    Firefox WebDriver Newsletter 138

    Julian Descottes

    2025-04-29
    Release Notes, Remote Protocols, WebDriver BiDi, WebDriver Classic

    Install webextensions as temporary extension, new command line argument for Firefox and other updates…

  • Firefox DevTools Newsletter — 137

    Firefox DevTools Newsletter — 137

    Nicolas Chevobbe

    2025-04-29
    Developer Tools, Release Notes

    Network request override, early hints headers, font metadata and more

  • Network override in Firefox DevTools

    Network override in Firefox DevTools

    Julian Descottes

    2025-03-31
    Developer Tools

    In Firefox 137, you can directly set network response overrides in Firefox DevTools. Learn more about this new feature.

  • Firefox DevTools Newsletter — 136

    Firefox DevTools Newsletter — 136

    Nicolas Chevobbe

    2025-03-31
    Developer Tools, Release Notes

    lossless JSON parsing debugging, persisting Network Raw response setting, better Inspector autocomplete and more!

  • Firefox DevTools Newsletter — 135

    Firefox DevTools Newsletter — 135

    Nicolas Chevobbe

    2025-03-31
    Developer Tools, Release Notes

    CHIPS cookies, more requests and new console helper

  • Firefox DevTools Newsletter — 134

    Firefox DevTools Newsletter — 134

    Nicolas Chevobbe

    2025-03-29
    Developer Tools, Release Notes

    Debugger fixes and accessibility improvements

  • Firefox WebDriver Newsletter 137

    Firefox WebDriver Newsletter 137

    Alexandra Borovova

    2025-03-28
    Remote Protocols, WebDriver BiDi, WebDriver Classic

    New features for WebDriver BiDi in Firefox 137: commands to install/uninstall web extensions, support for containers with event subscriptions and more!

  • Firefox WebDriver Newsletter 136

    Firefox WebDriver Newsletter 136

    Julian Descottes

    2025-03-11
    Release Notes, Remote Protocols, WebDriver BiDi

    New features for WebDriver BiDi in Firefox 136: subscription IDs for better event management and support for containers with preload scripts!

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