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. addons.mozilla.org Discussions about AMO add-on reviews and bugs. Add-on Support Need help with an add-on? Ask here! 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	24519	July 11, 2014
Is it group.color to retreive Group of Tabs color a user have selected? Development	0	9	May 22, 2025
ModHeader extension is not available in firefox Add-ons	6	3318	May 22, 2025
My (temporary) add on does not seem to trigger Add-on Support	1	17	May 22, 2025
Manifest V3 Background Script Issue Development	1	12	May 21, 2025
Can addons in review still get disabled if it's in violation of a Mozilla policy? Add-ons	0	17	May 20, 2025
Why does Firefox keep disabling the KEEPER add on? Add-ons	4	48	May 20, 2025
Template for Firefox Themes in svg format Themes	0	23	May 18, 2025
[Support] Brief Add-on Support	316	38768	March 11, 2024
WebExtError “unsupported filetype” when trying to sign a locally built extension addons.mozilla.org	6	58	May 16, 2025
Is it possible to access native workspaces/desktops? Development	1	21	May 15, 2025
Recent bug with validation? addons.mozilla.org issue	1	27	May 13, 2025
Is there a way to create an automatic theme? Themes	2	35	May 13, 2025
"Media resource could not be decoded" in extensions Development learning , issue	9	56	May 13, 2025
My addon has been waiting review since April 26, 2025 Add-ons	1	33	May 12, 2025
[Support] uMatrix Add-on Support	194	70727	May 12, 2025
Distributing Unlisted extesnion via direct link Development	2	37	May 8, 2025
Firefox Not Browsing At All On Windows 11 Firefox for Android Add-ons	2	27	May 12, 2025
Use of "autofocus" in popup.html not consistent Development	1	28	May 6, 2025
Tab group support in Firefox 138 Announcements	3	86	May 6, 2025
Initial tabs.hide() warning dialog Development	3	34	May 5, 2025
Manifest V3 issues for my extension Development	6	65	May 4, 2025
[Blog post] Two-factor authentication required for extension developers Announcements	13	2659	January 18, 2025
I made a post a few years ago , about using your own Background Image like in Windows Mail Add-ons	2	32	May 1, 2025
Bug with uploading "large" files in addon addons.mozilla.org	9	1896	May 1, 2025
Kaspersky Password Manager Add-on Support	0	26	May 1, 2025
File input doesn't trigger "change" event in options UI on Android Development	2	34	April 30, 2025
How do you debug issues related to going idle? (mv3) Development manifest-v3	4	31	April 30, 2025
Blocking notification on tab losing focus Add-ons	2	21	April 30, 2025
Suggested alarms / linux suspend workarounds? Development	2	33	April 30, 2025