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The Joy of Coding: Episode Guide
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Episode 429: Feb 11th, 2026
Links
Watch this episode on Air Mozilla
Joplin Agenda
Topics
https://www.keanu.codes/?code=429
Brought to you by HTTP code 429
https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status/429
Vertical tabs shipped last year! Here are prefs for controlling the expand behaviour:
sidebar.animation.expand-on-hover.delay-duration-ms
sidebar.animation.expand-on-hover.duration-ms *Q: I’d like an overview of how the whole FF testing infrastructure works
Interop
https://wpt.fyi/interop-2025?stable
https://mozilla.github.io/standards-positions/
Looking at some of our tests
https://searchfox.org/firefox-main/source/browser/components/backup/tests
Updating newtab’s UI out of band from the rest of the browser
https://addons.mozilla.org/en-CA/firefox/addon/new-tab-override/
RemoteSettings
https://remote-settings.readthedocs.io/en/latest/
https://firefox-source-docs.mozilla.org/services/settings/index.html
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Emilio hacking on Firefox