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Get started with Firefox extension development
Development

Extensions provide a simple and powerful way to personalize your browsing experience. If you know JavaScript, CSS, and HTML, you can build your own. If you are brand-new to add-on development, you can get started by che…

6 12057 September 6, 2023
How to keep the same internal UUID by installing a Firefox add-on in unlisted mode?
Add-ons
4 167 October 10, 2024
Dark theme_icons are ignored in Manifest v3 extension
Development
9 899 October 10, 2024
Reinstating the Language Representative Program
Common Voice
11 436 October 10, 2024
Tamper Monkey
Add-ons
2 34 October 10, 2024
revokeObjectURL() is no longer available within the context of a ServiceWorker
Developer Community
issue
1 20 October 10, 2024
Content security policy blocking injecting styles into pages
addons.mozilla.org
3 115 October 10, 2024
What is reason: Image, specifically Low quality, stretched, or blank?
Themes
6 52 October 10, 2024
Firefox Focus and Passkeys
Firefox On Android
issue
1 20 October 10, 2024
Happy BMO Push Day! (20241009.1)
Firefox Tooling Announcements
1 21 October 9, 2024
Assessment wanted for Media Queries and Responsive Web Design
Learn
learning ,  feedback
1 34 October 9, 2024
Please stop blocking Blue Blocker addon updates
addons.mozilla.org
feedback
7 209 October 9, 2024
How do I subscribe to categories and topics?
FAQs
4 6543 October 9, 2024
URLs are not allowed
addons.mozilla.org
4 154 October 9, 2024
What is the best way to automatically test the functionality of addons (eg for Github Actions)
Add-ons
3 291 October 9, 2024
Is the data set gpl or mit?
Common Voice
3 34 October 9, 2024
Browser extension storage "get" return value if nothing found
Development
5 146 October 9, 2024
Will linking to .xpi preserve user tracking?
Add-on Support
3 71 October 9, 2024
Общие принципы создания apk-пакетов android
Firefox for Android Add-ons
2 35 October 9, 2024
Is it possible to conditionally open sidebar depending on var in storage.sync
Add-on Support
4 79 October 8, 2024
Engineering Effectiveness Newsletter (August & September 2024 Edition)
Firefox Tooling Announcements
1 32 October 8, 2024
How Thunderbird handle it's subject encryption?
Developer Community
1 32 October 8, 2024
Why are we no longer able to flag very bad ratings
addons.mozilla.org
24 1096 October 8, 2024
Awaiting extension review for long time
Add-on Support
4 64 October 8, 2024
How to enable console.log from Service Worker?
Developer Tools
10 1485 October 8, 2024
WXT - "Next-gen Web Extension Framework"
Add-ons
2 68 October 7, 2024
Stuck awaiting review
Add-on Support
7 130 October 7, 2024
Where to post ideas for add-on writers I can't develop myself
addons.mozilla.org
3 79 October 6, 2024
Review cycle, how long in average?
addons.mozilla.org
2 71 October 5, 2024
NEW HERE? This forum is for Voice-AI Dataset Creation project called "Common Voice"
Common Voice
2 90 October 4, 2024