Firefox/Meeting/10-Jun-2025

Today’s meeting leader is: mconley

General Topics / Roundtable

• [mconley] Mossop wrote some interesting things about career levels at Mozilla

• [mconley] Context ID module

  • Please don’t access the context ID preference directly (I’ll be adding linting to try to prevent that). Use the module instead.

Friends of the Firefox team

Resolved bugs (excluding employees)

Script to find new contributors from bug list

Volunteers that fixed more than one bug

• Gregory Pappas [:gregp]

• Jonas Jenwald [:Snuffleupagus]

New contributors (🌟 = first patch)

• Anthony Mclamb: Bug 1967827 — Add moz-input-color link to customElements.js

• Brian Ouyang: Bug 1841773 — The link displayed after extension migration appears gray instead of blue as in Figma

• 🌟Chris Vander Linden: Bug 1888847 — DevTools Storage inspector cookie table rendering issue/misalignment with tall characters

• 🌟 gaastorgano: Bug 1911190 — Write a site-specific wrapper for kick.com that interprets a video duration of 0x40000000 as +Infinity

• Jonas Jenwald [:Snuffleupagus]: Bug 1966086 — PDF 2.0 Metatags

General triage

• Jared Hirsch, Hanna Alemu, Jonathan Sudiaman, Stephen Thompson are this month’s Firefox / Toolkit :: General triagers!

Project Updates

Add-ons / Web Extensions

(no updates for this week)

DevTools

• Chris Vander Linden fixed the Storage inspector table when it contains tall characters (#1888847)

• Roke Julian Lockhart changed the extension of exported logs from .txt to .log (#1969599)

• Masatoshi Kimura [:emk] fixed an issue in Netmonitor where responses containing multibyte characters would fail to be decoded (#1968766)

• Julien Wajsberg [:julienw] made about:debugging more enjoyable by automatically selecting the runtime page after the connection is done (#1968049)

• Holger Benl [:hbenl] fixed a few issues in the Responsive Design Mode toolbar (#1964126, #1968675, #1968677, #1968898)

• Alexandre Poirot [:ochameau] made "late" breakpoint (i.e. in unload event listener) to work for iframes (#1892411)

• Nicolas Chevobbe [:nchevobbe] fixed an issue where closing RDM would override the "Disable cache" setting in Netmonitor, even though the toolbox was still open (#1672473)

• Nicolas Chevobbe [:nchevobbe] fixed a couple Netmonitor crashes, when a JSON response was null (#1968257), and using the (re)send request panel (#1970248)

• Hubert Boma Manilla (:bomsy) improved performance by throttle some events in the parent process events on the server side (#1959452) (we were already doing it for content process events)

• Hubert Boma Manilla (:bomsy) fixed an issue in the webconsole "pinned-to-bottom" feature where the output could exit this state even though the user didn't scrolled up (#1966005)

WebDriver BiDi

• Thanks to :anutrix who removed the usage of six in testing/marionette/ directory.

• Julian updated the "browsingContext.navigate" and "browsingContext.reload" commands to wait for the `browsingContext.navigationCommitted` event when using the “wait” condition ”none”.

• Julian also implemented a new event "browsingContext.historyUpdated" which is emitted when using history.pushState/replaceState or document.open.

• Sasha added support for the "proxy" argument of the "browser.createUserContext" command. This allows clients to setup either a “direct” or “manual” proxy when creating a user context (ie Firefox Container). Support for additional proxy types will be added later on.

• Henrik removed all the code related to our experimental CDP implementation. We also published a fxdx.dev blog post to explain what this means for clients and end users.

Lint, Docs and Workflow

• Hanna enabled Prettier for our CSS files 🎉

• We've now upgraded to ESLint v9.6.0. More version bumps coming soon.

• Kagami added a file name matching option to ESLint for service workers to set the globals correctly when the filename is *.serviceworker.(m)js

• :gerard-majax enabled the rejected words linter on Rust code.

Migration Improvements

• tgiles fixed a stylistic glitch for support links shown when importing extensions from Chrome-based browsers

New Tab Page

• We’re rolling out a change to the release channel this week or next which will remove the descriptive text for stories, to reduce clutter and visual noise. This is part of an ongoing effort to refine the look and feel of New Tab

• We are planning on performing our first train-hop from Nightly 141 to Beta 140 next week. This train-hop will update Beta 140’s New Tab to use the code from Nightly 141. This will not ride the trains, so Release 140 will still use the Release 140 New Tab.

  • RelMan / QA is aware and will be testing both modes.

  • This is mainly a test to ensure that New Tab can be updated this way.

  • mconley also added some taskcluster jobs (currently Tier 3) that run Nightly New Tab’s XPI and automated tests against Beta (and eventually Release)

    • Example

• We’ve also in the early stages of an experiment for showing trending searches on New Tab

  • This is one variant we’re in the early stages of developing:

  • This is another variant that’s in its early stages:

Picture-in-Picture

• Thanks to gaastorgano, a volunteer contributor who provided a patch to make it so that kick.com live-streaming videos don’t show outrageous video durations when opened in Picture-in-Picture

Search and Navigation

• Address Bar

  • The unit converter has now been enabled by default.

    • The pref is browser.urlbar.unitConversion.enabled

    • e.g. 100 cm to inches, 1m to cm, 30 kg to lbs, 38 celsius, now to edt

    • Angle, Force, Length, Mass, Temperature, Timezone

    • For other examples: https://searchfox.org/mozilla-central/source/browser/components/urlbar/tests/unit/test_unitConversion.js

  • The search mode indication is now limited in width to avoid issues with search engines with long names.

  • The search button in the address bar now has support for selection via mouse up.

• Places

  • We transitioned browser/components/places to use the new moz-src: protocol.

Storybook/Reusable Components/Acorn Design System

• New component: moz-breadcrumb-group that displays a horizontal navigation trail - storybook link.

• moz-select got an icon support (in-page button only, not the dropdown) - storybook link.

• Clear button on search input enabled for chrome documents

  • Emilio is burning down search-textbox uses and replacing them with moz-input-search Bug 1968916

• moz-button size small is now 24px high

This week I learned

• [Gijs] You can have try record a video screencast of a test run by passing –env MOZ_RECORD_TEST=1 to your mach try command line. This works on macOS and Linux.

  • [julian] Link to doc https://firefox-source-docs.mozilla.org/testing/automated-testing/index.html#need-to-get-more-data-out-of-your-tests . Also `MOZ_DEVTOOLS_TEST_SCOPES=1` can be interesting

• [Mossop] Searchfox supports a number of extended ways to query. For example instead of the limited path filter box you can do a full regular expression search on the path. For example prefix your search with pathre:\.m?jsx?$ to search all JavaScript files.

  • [gijs] in the same vein, note that the path box supports ^, $ and * and glob syntax ({foo,bar}).

• [gijs] General triage got updated! If you’ve not triaged before, have a read through the doc and ask other folks (or worst case, me) questions if you have them.

  • (update to the bmo triage.json rotation file is pending as well)

• [nchevobbe via jdescottes] Bulk download your glitch apps: https://support.glitch.com/t/glitch-project-bulk-downloading/75872

Meeting Leader Rotation

Add your name below if you want to be in the rotation of leaders:

• mstriemer

• mconley

• hjones

• kpatenio

• jhirsch

• mcrawford

Headlines link

• https://docs.google.com/document/d/1u9YH3ULNRYg6G-fN-Udkvfkcvg0alJfzi_zIAfFNkL8/edit#