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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 12792 September 6, 2023
Sanctions against countries changing terms to license
North America
2 108 December 14, 2024
Bem-vindo a comunidade Mozilla Brasil
Brazil
42 5574 December 14, 2024
How can I change the color theme of Truthsocial.com on Firefox?
Development
1 15 December 14, 2024
WebVR 中文新鮮報 vol.9 (2017/06/26)
WebVR (Chinese 中文)
2 1101 December 14, 2024
两款翻墙机场梯子推荐，SSR/V2Ray/Torjan节点订阅
WebVR (Chinese 中文)
1 11 December 14, 2024
Raspbian 10 buster
WebThings
1 13 December 14, 2024
Install an unlisted extension in Firefox Android
Firefox for Android Add-ons
3 94 December 13, 2024
Virtual event Dec 19 - Pontoon 2024 highlights and more!
Localization
1 24 December 13, 2024
Firefox Profiler Deployment (December 12, 2024)
Firefox Tooling Announcements
firefox-profiler
1 38 December 12, 2024
Gamification: Badges in Pontoon!
Localization
1 33 December 11, 2024
Help Monitor Browser Choice in the EU!
Mozillians
1 32 December 11, 2024
Help wanted FlexBox Layout skill test 4
Learn
10 560 December 11, 2024
Breaking update for webthings and Arduino code
WebThings
4 442 December 11, 2024
Getting request was throttled , please try again later in 26175 seconds
addons.mozilla.org
5 1600 December 11, 2024
Community Portal
Community Portal
l10n ,  participation ,  sentence-collection ,  issue ,  dataset
1 43 December 11, 2024
Please add Bosnian as a language
Common Voice
l10n
15 2974 December 11, 2024
Does Fluent have a code compilation/optimization?
Fluent
2 440 December 10, 2024
Firefox Relay does not forward received emails
addons.mozilla.org
21 5542 December 10, 2024
Solicito evaluación para las pruebas de habilidades de texto básico HTML 1
Learn
1 71 December 10, 2024
MatrixNavbar has been broken on Wiki
Mozillians
feedback ,  issue
4 117 December 10, 2024
Missing icons, screenshots, and more
Add-on Support
3 82 December 9, 2024
Use OAuth 2.0 in Firefox WebExtension
Development
5 5594 December 9, 2024
How to import npm packages in content script in an extension?
Development
4 83 December 9, 2024
Is it possible to make a CLI for your browser extention?
Development
1 53 December 9, 2024
"commands" for android webextension?
Development
learning
2 435 March 1, 2024
How can I see a list of all accessible chrome:// URLs in Firefox
Firefox Development
1 71 December 6, 2024
PerfCompare just deployed (Dec 6, 2024)
Firefox Tooling Announcements
perfcompare
1 75 December 6, 2024
CORS Policy for Addon request
Development
6 296 December 5, 2024
Firefox blocks pop up when user reloads a page
Firefox Development
privacy-and-security
1 65 December 5, 2024