We’ve had a great first day and many great conversations at Open Source Summit Europe! Make sure to stop by our table (2nd floor, booth 4) at any point during the conference to say hi and talk about OSS, our projects and work, or anything else. #OSSEU #OpenSourceSummitEU #OpenSource

You won't get the redeclaration error in Firefox's Web Console much longer, as it's already available in Nightly if you're eager to try it early and will land in the regular release with Firefox 159 🦊

Before / after:

bugzilla.mozilla.org/show_bug.cgi?id=1257088

@webdevs.firefox.com

Happy 25th birthday @igalia.com. I am so inspired by the lasting value you have contributed to the web and society at large, and even moreso by your unwavering values in implementing that work. Here's to the next 25 years indeed!
www.igalia.com/2026/09/21/T...

The docs:
allKeyed: developer.mozilla.org/en-US/docs/W...
allSettledKeyed: developer.mozilla.org/en-US/docs/W...
proposal link: tc39.es/proposal-awa...
release notes: www.firefox.com/en-US/firefo...

Firefox 155 is out (Sept 1) 🦊

I contributed to the await dictionary proposal: Promise.allKeyed and Promise.allSettledKeyed, an object of promises now resolves to an object of results.

Thanks to Mozilla engineers Arai and Daniel for their guidance.

#Firefox #JavaScript