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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 10521 September 6, 2023
Upgraded add-on signatures
Announcements
1 14 April 17, 2024
Keeweb connect suddenly disappeared from the add-ons browser
Add-ons
5 98 April 17, 2024
Add-ons submissions help needed
Add-on Support
1 29 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)
1 20 April 17, 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 25 April 17, 2024
Shortcomings of Firefox themeing modules, many elements can't be themed or updated
Themes
1 27 April 17, 2024
Someone published copies of my add-on on AMO
addons.mozilla.org
46 1726 April 17, 2024
Regarding our add-on rejected by mozilla team
Add-ons
issue
4 78 April 17, 2024
Widevine addon is crashing
Add-on Support
3 232 April 17, 2024
Bookmarks bar is too narrow
Themes
learning ,  feedback
2 168 April 17, 2024
Custom theme light and dark
Themes
2 449 April 17, 2024
Add-on getting rejected on submission
Add-on Support
2 191 April 16, 2024
Firefox exceptionally slow compared with Chrome
Firefox Development
issue
6 1159 April 16, 2024
Python "native-messaging" web extensions on mac unable to read / write files on Downloads folder
Development
webextensions-api
2 659 April 16, 2024
Which policies apply to AMO-listed addons vs. self-distributed addons?
addons.mozilla.org
11 684 April 16, 2024
Firefox doesn't virus check downloads with Microsoft Windows Defender?
Firefox Development
2 61 April 16, 2024
Sentence collector copyright issues
Common Voice
sentence-collection
55 4731 April 16, 2024
Solicito evaluacion para la prueba de habilidad de texto básico HTML 1 - AC1DER
Learn
1 30 April 16, 2024
Addon/function that reads out emails, Text To Speech?
Add-ons
12 1472 April 16, 2024
Dictionary with wrong name in the addons page
addons.mozilla.org
3 181 April 16, 2024
Is this code safe?
Common Voice
issue
3 54 April 16, 2024
Giving progress notification after EVERY 5 listened sentences is annoying
Common Voice
5 387 April 16, 2024
Inaccurate results from 0.9.3 model
Common Voice
learning
2 38 April 16, 2024
Question about project plans
Common Voice
5 217 April 15, 2024
Inquiry Regarding Website Compatibility Issue in Mozilla Firefox
Common Voice
issue
2 42 April 15, 2024
Yahoo Homepage
Add-ons
issue
2 72 April 15, 2024
Save request response payload as file in Network tab
Developer Tools
2 2510 April 15, 2024
Issue when uploading via addons
Add-on Support
3 107 April 15, 2024
Idioma portugues-brasil
Web Services
1 31 April 15, 2024