Firefox DevTools @FirefoxDevTools

Built for you to design, code, test, refine a better web for everybody. Follow us for announcements, tips, sneak peeks, and more! firefox.dev Mozilla's Global Community Joined July 2013

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Firefox DevTools @FirefoxDevTools

3 weeks ago

Firefox 142 brings a few WebDriver BiDi and Classic updates: a new command to set the locale override, some changes around handling the cookies 🍪 and setting the proxy, and more at fxdx.dev/firefox-webdri… 🚀

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Firefox DevTools @FirefoxDevTools

2 months ago

🦊 Freshly released Firefox 141 comes with a few WebDriver updates. Setup a proxy for a container with browser.createUserContext, monitor history API usage with browsingContext.historyUpdated. And also a few changes around Cookies. Read more at fxdx.dev/firefox-webdri… 🚀

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Artem Manushenkov @amanushenkov

2 months ago

A little while ago I added a little quality of life feature to @FirefoxDevTools . Now the network filter query persists between devtools instances! (you used to have to type it out every time) ticket: bugzilla.mozilla.org/show_bug.cgi?i… before & after:

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Firefox DevTools @FirefoxDevTools

2 months ago

🦊 In Firefox 140, WebDriver BiDi allows to override certificates security settings per container and supports a new "navigationCommitted" event. This release also brings a few fixes for action simulation. More details at fxdx.dev/firefox-webdri… 🚀

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Firefox DevTools @FirefoxDevTools

3 months ago

State of CSS 2025 is now open: stateofcss.com Browser vendors use the results of 'State of' surveys to help prioritize the features to work on. If you care about CSS, please take some time to answer it, and help shape the future of the language

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Firefox DevTools @FirefoxDevTools

3 months ago

Oops, we forgot to share the WebDriver news for Firefox 138! WebDriver BiDi now lets you install unsigned extensions and allows to set a default viewport for user contexts: fxdx.dev/firefox-webdri… #Firefox #WebDriver #WebDev

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Firefox DevTools @FirefoxDevTools

3 months ago

Firefox 139 introduces geolocation override via WebDriver BiDi! Now you can easily test location-aware features: fxdx.dev/firefox-webdri… #Firefox #WebDriver #WebDev

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Firefox DevTools @FirefoxDevTools

3 months ago

CDP is removed in Firefox 141 in favor of WebDriver BiDi. For details see fxdx.dev/cdp-retirement… #Firefox #WebDev

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Firefox DevTools @FirefoxDevTools

4 months ago

With @firefox 138 just around the corner, did you noticed some of the changes we made in 137? Find out in our latest blog post: fxdx.dev/firefox-devtoo… #devtools #html #css #js #network

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Firefox DevTools @FirefoxDevTools

5 months ago

New for WebDriver BiDi in Firefox 137: commands to install/uninstall web extensions, support for containers with event subscriptions and more at fxdx.dev/firefox-webdri…

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Firefox DevTools @FirefoxDevTools

6 months ago

New features for WebDriver BiDi in Firefox 136: subscription IDs for better event management and support for containers with preload scripts! More details at fxdx.dev/firefox-webdri… 🚀 #Firefox #WebDriver

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Firefox DevTools @FirefoxDevTools

6 months ago

Cypress 14.1.0 now defaults to WebDriver BiDi for Firefox 135+. A major step in modernizing browser automation! fxdx.dev/webdriver-bidi… #WebDriverBiDi #Firefox

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Firefox DevTools @FirefoxDevTools

6 months ago

Geckodriver 0.36.0 is here! 🚀 Improved WebExtension support, precise pointer move actions, better crash handling & fixed WebAuthn endpoints

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Firefox DevTools @FirefoxDevTools

7 months ago

Discover the latest WebDriver updates in Firefox 135 release! Learn about improved user interaction simulations and new screenshot capabilities. Read more at fxdx.dev/firefox-webdri… 🚀

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Firefox DevTools @FirefoxDevTools

8 months ago

First WebDriver updates for 2025 with the release of Firefox 134! Checkout the release notes at fxdx.dev/firefox-webdri… with a new WebDriver BiDi command for browser windows, additional fields in our network events and better addons support in Marionette.