Add-ons

Contribute Help keep Firefox the most customizable browser available. Contribute code, organize events, translate things, evangelize, and more. Firefox for Android Add-ons This space is specifically for developers with technical questions as they prepare their desktop add-ons for availability on Android. Themes Discussions about background themes and complete themes. Add-on Support Need help with an add-on? Ask here! addons.mozilla.org Discussions about AMO add-on reviews and bugs. Announcements Important announcements for the add-ons community. Development Technical discussions about add-on development.

Topic	Replies	Views	Activity
About the Add-ons category Add-ons	0	24681	July 11, 2014
Is Firefox MV3 intentionally not supporting `browser.runtime.onMessage` in MV3 userScripts API? Why? Development	8	129	January 21, 2026
AMO review pending since Dec 17 - no response for over a month addons.mozilla.org add-on-reviews	0	13	January 21, 2026
Awaiting Review for 3 weeks now Add-ons	0	15	January 21, 2026
Why does runtime.onSuspend not execute window.localStorage.setItem? Development learning , issue	2	17	January 19, 2026
Questions about including third-party libraries Development	0	16	January 19, 2026
Help me Addons Add-on Support	1	10	January 19, 2026
Help please Add-on Support	2	21	January 15, 2026
Submitted Add-ons isnt appearing on my page Add-ons	2	25	January 14, 2026
Request to reuse deleted Add-on ID (Duplicate ID issue) Add-on Support	0	38	January 13, 2026
I submitted a new add-on that has not been reviewed – Submitted Jan 8 Add-ons	0	31	January 13, 2026
I submitted a new add-on that has not been reviewed Add-on Support	15	328	January 13, 2026
Windscribe 4.x.x Firefox extension release Add-on Support	4	40	January 11, 2026
Problems uploading a new add-on (SOLVED) Add-ons	4	19	January 10, 2026
New Windscribe Extension? Add-on Support	0	20	January 9, 2026
Are all add-ons open source? Add-ons openness	4	44	January 9, 2026
How do you let the world know about your new add-on? Add-on Support	2	58	January 7, 2026
How does Mozilla calculate daily users in the statistics panel? Development	0	32	January 5, 2026
How can GeckoView load a WebExtension for Android local pages? Add-ons issue	0	20	January 5, 2026
Lost access to two-factor authentication app after changing phone addons.mozilla.org	0	15	January 3, 2026
Someone registered an extension using my email address, so now I can't. Could you validate email-style IDs so they can't be hijacked? Add-on Support	0	23	January 3, 2026
Add-on auto-approved then permanently disabled ~10 minutes later (no actionable notes) Add-on Support	4	70	January 3, 2026
Unable to submit extension: data_collection_permissions catch-22 Add-ons feedback , issue	1	44	January 2, 2026
Why does my extended review take half a month? Thank you, sir. Add-ons	1	34	December 30, 2025
How to automate add-on option screen tests? Development	7	203	December 30, 2025
Firefox Extension Review Pending Add-ons	2	63	December 24, 2025
Firefox Default Themes & Theme Values Development	2	36	December 24, 2025
Pourquoi je ne peux plus installer l'extension EBuyClub Add-on Support	1	66	December 24, 2025
Mail Merge add-on feature questions Add-on Support	1	24	December 24, 2025
Possible issue with new data_collection_permissions soon to be required? Add-on Support	2	41	December 24, 2025