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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 @FirefoxNightly!pic.twitter.com/DOHbHJXtAR
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Exclusion filtering in Console was brought up by
@wesbos in https://twitter.com/wesbos/status/1216785228255170560 …. Cutting through log noise can be a grind, so DevEdition 73 now has this quality of life improvement. https://www.mozilla.org/en-US/firefox/developer/ … (Patched by@digitarald, yours truly, in https://bugzilla.mozilla.org/show_bug.cgi?id=1291192 …)pic.twitter.com/3W3aEz0lwm
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In case you missed
@syntaxfm's "A Month on Firefox" (aka "DevTools are really good"): https://syntax.fm/show/213/hasty-treat-a-month-on-firefox … One of the bugs mentioned by@wesbos was CORS errors. CORS can be a headache, so in DevEdition 73 those work as expected –
to @bz_moz. /@digitaraldpic.twitter.com/RG9tMSYSlw
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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: https://www.mozilla.org/en-US/firefox/developer/ …pic.twitter.com/7VeFgUuWMF
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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
— @nicolaschevobbepic.twitter.com/Yaf92pNoj8
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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: https://discourse.mozilla.org/t/show-media-queries-in-responsive-design-view/50187 … Thanks! —Vpic.twitter.com/H4Ldm8aszp
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Check out the beautiful
#aspnet SignalR Hub messages in Firefox's WebSocket Inspector! The tool shipped in 72:
https://hacks.mozilla.org/2019/10/firefoxs-new-websocket-inspector/ … & you had feedback: https://twitter.com/davidfowl/status/1184364405766545408 … cc @davidfowl. SignalR support comes with 72, now in DevEdition: https://firefox.dev/ pic.twitter.com/m0lzBFgfrZ
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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? —Vpic.twitter.com/RQw7ou4Zno
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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) —@violasongpic.twitter.com/oHABWHLnsI
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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 http://profiler.firefox.com in compare mode on the improvements mentioned in the linked thread. Would this make your performance work easier? https://twitter.com/FirefoxDevTools/status/1204625601627213825 …pic.twitter.com/1WUthCugFB
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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: https://perfht.ml/2P7EPgj pic.twitter.com/bPAgSrXw5g
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A
#webperf tale from the ongoing performance journey of@FirefoxDevTools. Or, how we got rid of one performance cliff in the Network panel & the workflows and tools that got us there. Starting with: https://perfht.ml/348sQU1
by /@digitaraldpic.twitter.com/b0P7lgKegX
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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.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Server-Timing …pic.twitter.com/PiY2yUeNQe
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DevTools tip: Did you know that
@FirefoxDevTools had a tool to measure arbitrary areas on a page?
Enable it first from the settings panel.
https://developer.mozilla.org/en-US/docs/Tools/Measure_a_portion_of_the_page …pic.twitter.com/lD6A3WbD50 -
Firefox's Debugger for Visual Studio
@code got its deserved logo update
and a big version bump:
Support VSCode's new column breakpoint UI
Faster and more accurate source map support
https://marketplace.visualstudio.com/items?itemName=firefox-devtools.vscode-firefox-debug … or search "Firefox" in VSCode.pic.twitter.com/00A9ryOdXG
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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. —@violasong https://www.smashingmagazine.com/2019/10/guide-new-experimental-css-devtools-firefox/ …pic.twitter.com/Xq3Mq8uPsO
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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 Managerpic.twitter.com/aKqROqAeos
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Auditing For Accessibility Problems with Firefox DevTools
https://hacks.mozilla.org/2019/10/auditing-for-accessibility-problems-with-firefox-developer-tools/ …
@MarcoInEnglish' grand tour of the Accessibility panel & new features:
Basics of Accessibility Tree
Audit for issues in Labels, Keyboard and Contrast
Color Vision Deficiency Simulatorpic.twitter.com/uoCIRV74Ft
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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: https://discourse.mozilla.org/t/feedback-wanted-keyboard-and-focus-visibility-accessibility-audit/47359 …pic.twitter.com/mc97bjaRDx
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While our own benchmarks have us confidence, it has been amazing to see the early user reports for this work in https://bugzilla.mozilla.org/show_bug.cgi?id=1429522 …pic.twitter.com/8yhNQBg7GS
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