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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 10596 September 6, 2023
The resigning of old add-ons
addons.mozilla.org
1 2 April 26, 2024
Localization Fireside Chat: let us answer your questions!
Localization
2 44 April 26, 2024
How to enable "cycle to recently used" but disable thumbnail preview?
Firefox Development
1 19 April 26, 2024
Https://webthings.io/ Is inaccessible again
WebThings
2 36 April 25, 2024
Gaming (farlight 84)
TTS (Text-to-Speech)
1 23 April 25, 2024
Ye Olde MTV... but different
MDN
learning ,  issue
1 29 April 25, 2024
Add-ons that break Websites & Add-on Management
Add-ons
3 47 April 25, 2024
Where is this path?
Development
learning
2 45 April 25, 2024
Mepco Online Bill
technology
2 310 April 24, 2024
Shortcomings of Firefox themeing modules, many elements can't be themed or updated
Themes
3 97 April 24, 2024
Upcoming site maintenance for Extension Workshop
Announcements
1 38 April 24, 2024
Weekly Update Thread - 2024
Common Voice
11 451 April 24, 2024
How to build something to add customized fields to the firefox password manager
Add-ons
1 37 April 24, 2024
Firefox OS user night
Toronto
3 1339 November 6, 2015
Any Chance Tab Groups Will Ever Come?
Firefox Development
40 11231 April 23, 2024
"Reported" themes not being checked
Themes
3 159 April 23, 2024
Why can I not load a simple custom extension/addon xpi file in Android Nightly?
Add-on Support
2 236 April 23, 2024
Menu font change in FF for Mac
Add-ons
2 118 April 23, 2024
Allow an extension to configure Firefox security devices_PCKS11
Add-on Support
3 210 April 23, 2024
Common voice pashto
Common Voice
3 79 April 23, 2024
Modify headers with declarativeNetRequest.updateSessionRules()?
Development
issue
6 260 April 22, 2024
PKCS11_addon
addons.mozilla.org
2 175 April 22, 2024
Addon to change tab title
Add-on Support
2 219 April 22, 2024
Making an addon searchable in https://addons.mozilla.org
addons.mozilla.org
2 193 April 22, 2024
My Add-on keep getting taken down for no reason
Development
2 64 April 22, 2024
Python "native-messaging" web extensions on mac unable to read / write files on Downloads folder
Development
webextensions-api
3 906 April 22, 2024
翻墙机场推荐丨翻墙梯子推荐丨稳定好用便宜的手机电脑vpn
WebVR (Chinese 中文)
1 137 April 17, 2024
免费分享稳定vpn梯子工具，便宜好用的翻墙机场推荐
WebVR (Chinese 中文)
2 89 April 22, 2024
Is it OK if Firefox flooded /log/syslog with the dozens of apparmor="DENIED" messages every minute?
mozilla helping club
4 717 April 21, 2024