Firefox/Meeting/19-Sept-2023

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General Topics / Roundtable

Friends of the Firefox team

Resolved bugs (excluding employees)

Script to find new contributors from bug list

Volunteers that fixed more than one bug

  • Masatoshi Kimura [:emk]
  • Sebastian Zartner [:sebo]
  • Zac Svoboda :zacnomore

New contributors (🌟 = first patch)

  • Krishna Ravishankar fixed incorrect removal of non-expr-stmt when top-level-await is present
  • LyScott123 updated ObjectInspector to show wrapped primitive

General triage

Project Updates

Add-ons / Web Extensions

WebExtensions Framework

  • In Bug 1851373, we fixed a regression (Bug 1830767) related to event pages being terminated while still running. This is a short-term workaround that we also uplifted to both Beta and Release. The longer term fix is now tracked by Bug 1844041.

WebExtension APIs

  • Fixed a bug that was making the scripting API method getRegisteredContentScripts to be returning scripts registered using the contentScripts API by the same extension - Bug 1851173.

    • NOTE: only manifest_version 2 extensions may have been able to hit this bug, and only if they are using both APIs (e.g. as part of transitioning to scripting API from contentScripts API but keeping the use of the contentScripts API for cases where the scripting API couldn’t be still used for). We don’t expect this bug to have been hit that often.

  • As part of migrating WebCompat built-in to the scripting API, we ran into Bug 1853409 because the scripting API matchAboutBlank is unconditionally set internally and we do not expose it in the API (See Bug 1853013 comment 6). As a short term workaround, we agreed with the WebCompat team to special-case the WebCompat extension ID in Bug 1853412 until the underlying Bug 1853409 has been fixed.

Developer Tools

DevTools

  • Contributors

    • Sebastian Zartner (:sebo) added inactive CSS warnings for ignored properties on

      • ::placeholder pseudo-elements (bug)
      • ::first-letter pseudo-elements (bug)
      • ::cue pseudo-elements (bug)

    • Zac Svoboda (:zacnomore) made a lot of contributions in the last 2 weeks

      • Switch to Data view when JSON is broken (bug)
      • Fixed color contrast for Layout flexbox highlight toggle (bug)
      • Tweaked spacing on compatibility panel elements (bug)
      • Fixed a typo in a property name (bug)

    • LyScott123 made wrapped primitive value visible in console/debugger (bug)

    • krishna.ravi732 fixed a bug in top-level await console evaluation and for loops (bug)

  • Arai added column source notes to binary operator and function call arguments so the debugger can underline the right expression for Uncaught TypeError (bug)
  • Alex improved the debugger performance (e.g. opening a big file is 20% faster) keeping data in a worker and then querying the worker, instead of transfering the data from the worker to the main thread (bug, bug)
  • Bomsy fixed an issue that would lead to debugger crashes (bug)

  • Nicolas made the Computed panel show custom properties value (bug)

  • Nicolas made the Rule view refresh when a stylesheet is added to the page (bug)

WebDriver BiDi

  • Sasha implemented the script.realmDestroyed event which lets clients know when the realm is not available anymore for script evaluation (bug)
  • Sasha implemented the browsingContext.userPromptClosed event (bug)
  • Henrik implemented the browsingContext.reload, which provides a simple API to reload a given browsing context (bug)
  • Julian updated our vendored version of puppeteer to v21.2.0, with almost 100 new tests passing with the BiDi implementation (close to the 50% mark, see https://puppeteer.github.io/ispuppeteerwebdriverbidiready/ ) (bug)

ESMification status

  • (no voice update)
  • No changes this time.

  • ESMified status:

    • browser: 86%

    • toolkit: 99%

    • Total: 95.55%

  • #esmification on Matrix

Information Management

Lint, Docs and Workflow

  • (no voice update)
  • The ESLint rule react-hooks/exhaustive-deps will now raise errors rather than warnings. The previous warnings for this rule have been fixed.
  • Additionally, all the rules enabled in devtools/client/debugger will now all raise errors rather than warnings.
  • With some other improvements, we're now down to about 13 ESLint warnings left in mozilla-central.
  • This all helps to ensure that we're fixing issues where we intend for them to be fixed. It also means that using warnings as part of a roll-out mechanism will help highlight that the warnings are something that we need to fix.

Migration Improvements

  • Extension migration support has started to roll out on the release channel! Note that this only supports a limited number of Chrome extensions at this point.

  • Improvements importing when Firefox is installed as a Snap

  • We’re doing a small experiment to see if adding some adorable illustrations to the device migration wizard improves the number of people going through it.

New Tab Page

Performance

Search and Navigation

Storybook/Reusable Components

This week I learned

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