Firefox DevTools

@FirefoxDevTools

Built for you to design, code, test, refine. Follow us for announcements, tips, sneak peeks, and more!

Vrijeme pridruživanja: srpanj 2013.

Medijski sadržaj

  1. 22. sij

    📢Just in 📢 New CSS warning when top, right, bottom, left or z-index are used on a non-positioned element. Try it out today on !

  2. 16. sij

    Exclusion filtering in Console was brought up by in . Cutting through log noise can be a grind, so DevEdition 73 now has this quality of life improvement. (Patched by , yours truly, in )

  3. 16. sij

    In case you missed 's "A Month on Firefox" (aka "DevTools are really good"): One of the bugs mentioned by was CORS errors. CORS can be a headache, so in DevEdition 73 those work as expected – 🙏 to . /

    Better CORS errors, previously warnings
  4. 14. sij

    🕵️‍♀️ Who scheduled this event that fired and called a promise? Trace Errors and Logs back to their asynchrounous origins: 🙌🏻 Asynchronous Stacks for Console (just landed in Nightly for Debugger) Exclusive in DevEdition for now:

  5. 6. sij

    The console autocomplete popup now displays variables, functions and classes declared in the input (even if the expression wasn't evaluated yet). This should help when writing longer snippets 🙂

    screenshot of Firefox DevTools webconsole autocomplete popup
  6. 20. pro 2019.

    Do you use this UI in Chrome for visualizing media query breakpoints? We'd love to learn more about: • what specific problems you solve with this • what else you wish it did Reply here or on Discourse: Thanks! —V

  7. 12. pro 2019.

    Check out the beautiful SignalR Hub messages in Firefox's WebSocket Inspector! The tool shipped in 72: 📯 & you had feedback: cc . SignalR support comes with 72, now in DevEdition:

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  8. 12. pro 2019.

    💡 Changes Panel: Follow-up question! We're thinking about preventing the + and - signs from being selected/copied. Would this negatively affect your workflow? If so, how? —V

  9. 11. pro 2019.

    💡 Feedback needed for Changes panel: Do you copy and paste directly from the panel instead of using the export buttons? If so, why? (We're trying to understand this use case so we can make improvements - either to what is copied, or to the export options) —

  10. 11. pro 2019.

    If you got curious about Firefox Profiler and wanted to know more about how to navigate it and interpret the data: Here is a quick tour of in compare mode on the improvements mentioned in the linked thread. Would this make your performance work easier?

  11. 10. pro 2019.

    Creating a `new Map()` and copying over the resources from the old Map in a Network panel with 3000+ resources takes 25ms. This time grows with every resource added. Stack Chart in the Profiler shows the seesaw pattern:

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  12. 10. pro 2019.

    A tale from the ongoing performance journey of . Or, how we got rid of one performance cliff in the Network panel & the workflows and tools that got us there. Starting with: 🧵 by /

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  13. 3. pro 2019.

    Long-awaited and finally ready in Firefox 71 ✨ … Server Timings visualized 📊 in the DevTools Network panel! Get started by instrumenting your backend's performance and sending measurements as Server-Timing HTTP headers.

    Your backend’s Server Timing headers visualised for each network response
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  14. 3. pro 2019.

    DevTools tip: Did you know that had a tool to measure arbitrary areas on a page? 📏 Enable it first from the settings panel.

  15. 18. stu 2019.

    Firefox's Debugger for Visual Studio got its deserved logo update 🎨 and a big version bump: ⏸ Support VSCode's new column breakpoint UI 🗺 Faster and more accurate source map support or search "Firefox" in VSCode.

  16. 13. stu 2019.

    ICYMI: Here's a guide to our 7 new CSS DevTools with easy steps for getting started. All the tools have been released as of Firefox 70! 🎉 As always, feedback is very welcome. —

  17. 7. stu 2019.

    Did you know Firefox's about:performance? 🔋 Easily find the tab, iframe or extension that churns your CPU, spins your fan and drains your battery 🧱 Find and close the memory-leaking tabs to free precious RAM Also available via hamburger menu: More > Task Manager

  18. 29. lis 2019.

    🔎 Auditing For Accessibility Problems with Firefox DevTools ' grand tour of the Accessibility panel & new features: 🌲 Basics of Accessibility Tree ✅ Audit for issues in Labels, Keyboard and Contrast 🎨 Color Vision Deficiency Simulator

  19. 25. lis 2019.

    New in Firefox 70, the Accessibility offers quick audits for highlighting ⌨️ Keyboard usability and🖱 Focus styling issues. 📯 Help us to make it even better 📯 How well does it work for you? What causes false positives? More details in our discourse:

  20. 24. lis 2019.

    While our own benchmarks have us confidence, it has been amazing to see the early user reports for this work in

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