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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 12715 September 6, 2023
Missing icons, screenshots, and more
Add-on Support
1 14 December 8, 2024
Why we use arrow keys for sub-navigation on page instead of tab?
Learn
learning
1 27 December 8, 2024
"commands" for android webextension?
Development
learning
2 411 March 1, 2024
MatrixNavbar has been broken on Wiki
Mozillians
feedback ,  issue
2 77 December 7, 2024
How can I see a list of all accessible chrome:// URLs in Firefox
Firefox Development
1 36 December 6, 2024
PerfCompare just deployed (Dec 6, 2024)
Firefox Tooling Announcements
perfcompare
1 42 December 6, 2024
CORS Policy for Addon request
Development
6 264 December 5, 2024
Firefox blocks pop up when user reloads a page
Firefox Development
privacy-and-security
1 36 December 5, 2024
免费分享稳定梯子推荐︱翻墙机场节点订阅
WebVR (Chinese 中文)
1 45 December 5, 2024
Community live stream event (Nov 20)
Announcements
3 253 December 5, 2024
New Discord for Common Voice launching
Common Voice
2 45 December 5, 2024
Cutoff date for Dec dataset release is Dec 6th
Common Voice
2 101 December 5, 2024
Common Voice in action in Tanzania with the Kiazi Bora mobile app, helping rural women
Common Voice
1 36 December 4, 2024
When publishing a theme, Firefox says the theme is corrupt
Themes
learning ,  issue
1 65 December 4, 2024
Konkani and its Variants: Which script to pick for MCV website interface?
Common Voice
12 541 December 4, 2024
Is it OK if Firefox flooded /log/syslog with the dozens of apparmor="DENIED" messages every minute?
mozilla helping club
8 1452 December 4, 2024
Engineering Effectiveness Newsletter (October / November Edition)
Firefox Tooling Announcements
1 55 December 3, 2024
[multi-account container] prevent to get the requests/responses in [firefox dev tools network monitor]
Firefox Containers
developer-tools
1 1006 May 22, 2023
Code in content_scripts not executed when document changes?
Development
5 113 December 2, 2024
[Support] Sage-Like - Sidebar Based RSS Feed Reader
Add-on Support
88 12513 December 2, 2024
Decompression efficiency compared between tar.bz2 and tar.xz (LZMA)
Firefox Nightly
2 87 December 2, 2024
How long does it take to develop a standalone website from scratch with no prior experience
Learn
learning
2 390 December 2, 2024
ECOBEE Enhanced Thermostat
WebThings
8 209 December 2, 2024
What version of Android Firefox added support for MV3?
Development
5 274 December 2, 2024
Missing 'Copy Link Text' in Firefox? Try This Extension!
Firefox for Android Add-ons
1 175 December 2, 2024
Firefox Profiler Deployment (November 27, 2024)
Firefox Tooling Announcements
firefox-profiler
1 116 November 29, 2024
Error testing addon with web-ext in Android. Unable to retrieve current user
Development
5 159 November 29, 2024
Will Mozilla ever put Firefox Bookmarks Manager in a tab?
Firefox Development
4 446 November 28, 2024
Extension for block ads does not work as it should
Development
4 161 November 28, 2024