A Better Screenshots Tool and More - These Weeks in Firefox: Issue 156

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Katherine Patenio

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Mar 11, 2024, 1:02:49 PMMar 11
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Hey Firefox enthusiasts,


Here are the latest updates following our bi-weekly Firefox Desktop meeting on Tuesday, March 5th. Check out some of the newest features, bug fixes and more below!

Special thanks to Mike Conley and Niklas Baumgardner for helping me put these notes together.

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Highlights

  • The new Screenshots component (which replaces the Screenshots built-in extension) is now enabled by default on Nightly (bug 1789727)! This improves upon the extension version of the feature in a number of ways:

    • You can capture screenshots of about: pages and other pages that extensions cannot normally manipulate

      • [screenshot]
        • alt text: The Screenshots feature in Firefox functioning within the about:config page.

    • Improved performance!

    • Greatly improved keyboard and visual accessibility

    • You can ensure it’s on by default by checking if screenshots.browser.component.enabled is set to true in about:config

    • Found issues with the new component? File them here!

    • You can access the Screenshot feature via the keyboard shortcut (ctrl + shift + s or cmd + shift + s for macos), the context menu, or by adding the Screenshot button to your toolbar via toolbar customization

  • The Firefox Profiler has a new "Network Bandwidth" feature to record the network bandwidth used between every profiler sample. Example profile

    • [screenshot]
      • alt text: Two different timelines - one for Network and one for Bandwidth - in Firefox Profiler.

  • Florian gave a FOSDEM talk about the Firefox power profiling

  • Nicolas added support for incoming input[type=range]::slider-* pseudo elements (bug)

    • behind layout.css.modern-range-pseudos.enabled

    • [screenshot]
      • alt text: The devTools inspector showing CSS rules for several input slider pseudo elements.

  • Karandeep made a clipboard feature for the address bar. Currently, we plan to ship this enabled by default in Firefox 125!

    • [screenshot]
      • alt text: The Firefox address bar with a "Visit from clipboard" button.

Friends of the Firefox team

Resolved bugs (excluding employees)

Script to find new contributors from bug list

Volunteers that fixed more than one bug

  • Bojidar Marinov [:bojidar-bg]

  • Nikki Bernobic [:echrs]

New contributors (🌟 = first patch)

Project Updates

Developer Tools

DevTools 

  • Arai fixed an issue where ReadableStream.values() was eagerly evaluated  (bug)

  • Alex added a button dedicated to source map settings in the editor footer (bug)

    • [screenshot]
      • alt text: Tooltip at the bottom of the devTools editor displaying available Source Map settings and which of those settings are enabled.

  • By popular demand, Alex added back the preference to control the Debugger Pause Overlay (bug)

    • set  devtools.debugger.features.overlay to false if you want to disable it

  • Alex fixed performance issues in the debugger when a page had a lot of sources (bug)

  • Hubert fixed an issue in the debugger where the Outline view wouldn't populate (bug)

  • Julian fixed opening relative URL of <img> on pages with a <base> (MDN) tag (bug)

  • Alex added an option in the tracer to track all DOM Mutations (bug)

    • from the console :trace --dom-mutations

    • [screenshot]
      • alt text: The tracer in Firefox devTools notifying when and at what time a DOM mutation occurs.

    • (Set devtools.debugger.features.javascript-tracing to true to enable the tracer)

WebDriver BiDi

  • Thanks to Kagami who implemented set_permission for marionette driver (bug)

  • Sasha implemented the storage.deleteCookies command for WebDriver BiDi. (bug)

  • Sasha added support for the userContext field of the partition parameter for storage.getCookie and storage.setCookie commands. (bug)

  • Julian implemented a basic version of the network.provideResponse command. (bug)

ESMification status

  • ESMified status:

    • browser: 100%

    • toolkit: 99.83%

    • devtools: 89.29%

    • dom: 96%

    • services: 98.94%

    • Only 10 JSMs left in the tree!

    • Total:  99.35% (+0.00% from last time)

  • #esmification on Matrix

Lint, Docs and Workflow

Migration Improvements

New Tab Page

  • We’re in the early phases of building out an experiment that lets people set wallpapers on about:home/about:newtab. Stay tuned!

Performance Tools (aka Firefox Profiler)

  • Made the call tree sidebar localizable.

    • [screenshot]
      • alt text: Call tree sidebar in Firefox Profiler displaying various characters and letters to demonstrate that it can be localized.

  • Marker count is shown next to the marker name in the marker chart when a marker is hovered.

    • [screenshot]
      • alt text: A table in Firefox Profiler showing DOMEvent as a listed event that was counted up to 410 times.

  • Improved performance of the marker chart when there are so many overlapping markers.

  • Improved the power graph and made it easier to see very small values in the graph by hiding the zero values.

    • Before:

      • [screenshot]
        • alt text: The power graph in Firefox Profiler before implementing changes that make it easier to see small values.

    • After:

      • [screenshot]
        • alt text: The power graph in Firefox Profiler after implementing changes that make it easier to see small values.

  • Fixed the hittesting on the activity graph.

    • [screenshot]
      • alt text: Activity graph for a sample Firefox Profiler profile that ran for 686ms.

  • Fixed the marker stacks that were broken because of a symbolication issue.


Search and Navigation

  • Work continues on Consolidated Search Configuration and improvements from mcheang and standard8)

    • Mandy landed a bunch of patches to get tests ready for the roll out of new search configuration - 1870684

    • Standard8 refactored some code for search settings. 1879625 




  • Work continues on Cross-Platform Suggest from adw, daisuke, and karandeep. These fixes include:

    • Yelp suggestions, improving the suggestion feedback button, fixes to weather suggestion

    • Urlbar.impression telemetry removed that is no longer needed


  • Work continues on Search and SERP telemetry categorization from scunnane and jteow

Storybook/Reusable Components

Below the fold


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This information, including all of the previous updates, are fully available in this doc: https://docs.google.com/a/mozilla.com/document/d/1u9YH3ULNRYg6G-fN-Udkvfkcvg0alJfzi_zIAfFNkL8/edit?usp=sharing

Also note that we’re really just synthesising and humanising the stuff that's on the Wiki, which is freely available from here: https://wiki.mozilla.org/Firefox/Meeting, so check that out if you want the source material. It'll also be posted (minus the Below the Fold stuff) to the Nightly blog.

Finally, if there's a Firefox-ish team that you feel isn't being represented here, please let them know about the above meeting so we can get their updates.

Keep on rockin' the free web,

kpatenio
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