State of
Firefox
Add-ons

Simeon Vincent
Developer Relations Engineer, Firefox Add-ons

good

and getting better

some stats

46,472

extensions on addons.mozilla.org

https://addons.mozilla.org/en-US/firefox/search/?type=extension

1,892

Android extensions on addons.mozilla.org

https://addons.mozilla.org/en-US/android/search/?type=extension

Add-on usage

https://data.firefox.com/dashboard/usage-behavior

User distribution

https://firefox-stats.com/stats

UX
improvements

User scripts

Debugging
improvements

Bug fixes

Content scripts

Console context

Cross-browser
collaboration

W3C

World Wide Web Consortium

WECG

WebExtensions Community Group

WECG

  • Reducing inconsistencies
  • Evolve browser extensions

github.com/w3c/webextensions

Meetings!

  • Every other Thursday at 8 AM Pacific
  • W3C's annual conference (TPAC)
  • Face to face

Resources

discourse.mozilla.org/c/add-ons

extensionworkshop.com

github.com/mdn/webextensions-examples

Contact

@dotproto.com

@dotproto@toot.cafe

Firefox Add-ons Office hours
extensionworkshop.com/contact

dotproto.com/talks/fosdem2025