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	24658	July 11, 2014
Is Firefox MV3 intentionally not supporting `browser.runtime.onMessage` in MV3 userScripts API? Why? Development	2	14	December 10, 2025
Cannot switch to my previous Add-on-URL Add-on Support	3	14	December 9, 2025
Add-on Stuck in “In Review” for 2 Days — How Long Does Review Usually Take? Add-ons add-on-reviews	1	6	December 9, 2025
Unable to delete add-on in developer hub, script errors on page addons.mozilla.org	2	6	December 9, 2025
How long does it take a new add-on to be reviewed? addons.mozilla.org	3	6	December 9, 2025
Why do Firefox addon upload still need Google reCaptcha at 2025? Add-ons	2	11	December 9, 2025
No option to upload updated version Add-ons	1	14	December 5, 2025
Help! My add-ons are all installing with same exact program name addons.mozilla.org	1	22	December 5, 2025
Distinctly defined Tabs Themes	0	13	December 5, 2025
Add On Approval Time? Add-on Support	5	103	December 5, 2025
Firefox 145 - all extensions disappeared from toolbar Add-on Support	1	71	December 4, 2025
How to prevent redirecting to HTTPS when fetching local address from a background script? Development	2	18	December 3, 2025
Do older Firefox versions ignore "data_collection_permissions"? Development	2	139	December 3, 2025
I cannot find my uploaded extension Add-ons issue	2	24	December 3, 2025
How to delete a disabled extension? addons.mozilla.org	3	29	November 30, 2025
Publish a extension on the store Add-ons issue	7	78	November 26, 2025
How to fix lost bookmarks ..so far NOTHING works Add-on Support	6	1518	November 24, 2025
Report system not responding to racist slurs like "jap" Add-ons	3	68	November 21, 2025
How create spell-checking extension Add-ons spellcheck	3	41	November 19, 2025
Ownership transfer addons.mozilla.org	5	91	November 19, 2025
A way to set tab context as default for new tab Development	3	67	November 18, 2025
Security of Add Ons and Extensions Add-on Support	3	40	November 18, 2025
[EDITED] Error: Permission denied to access property "then" Development issue , manifest-v3	4	2145	November 18, 2025
Funcions `loadOneTab` and `loadURI` in 2023 in Firefox Experimental API? Development	2	686	November 16, 2025
I have made a theme inspired by Kit Themes participation	0	37	November 14, 2025
Merging duplicate contacts Add-on Support	0	31	November 12, 2025
Unable to write a review for an extension : Is there a trick? addons.mozilla.org	2	59	November 9, 2025
My add on is getting spam reviews addons.mozilla.org	2	15	November 12, 2025
How do I submit a new version for a theme? Themes learning	2	38	October 30, 2025