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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 11854 September 6, 2023
Heavy hard disk use
Firefox Development
1 11 September 16, 2024
Zimbra do not display mail body when AddOn BitWarden activated on MacOS
Add-on Support
3 128 September 16, 2024
Feature Request: Allow Users To Paste Code Snippets Into Debugger
Developer Tools
developer-tools ,  feedback
5 1948 September 16, 2024
Headings map extension does not work on my website
Add-ons
issue
2 48 September 15, 2024
“Duplicate add-on ID found” when submitting addon
Add-on Support
1 45 September 15, 2024
Top toolbar tab impossible to delete (nightly 132.0a1)
Firefox Nightly
2 59 September 14, 2024
CSS Font Error
Firefox Development
issue
1 37 September 14, 2024
Temporary Container for Everything opened in a particular tab
Firefox Containers
2 23 September 14, 2024
How to detect an element which is editable by the user
Development
feedback
8 1050 September 13, 2024
How to allow Thunderbird to render columns outside the viewbox?
Thunderbird
learning ,  feedback ,  issue
3 132 September 13, 2024
Bug dans la barre latéral (Nightly 132.0a1)
Firefox Nightly
1 37 September 13, 2024
Customized DNS seems incomprehensible to me
Firefox Nightly
1 38 September 13, 2024
Konkani and its Variants: Which script to pick for MCV website interface?
Common Voice
2 77 September 13, 2024
Beautilook ayurvedic Weight Loss product , Belly Fat Burner
business
internethealth
1 38 September 13, 2024
Error: filename must not contain illegal characters
Development
2 3815 September 13, 2024
Issues with Mozilla DevTools Debugger in Large Codebases?
Development
1 50 September 13, 2024
Truncated email
Thunderbird
2 80 September 13, 2024
Is translations in settings complete on v 129?
Firefox On Android
1 50 September 12, 2024
Feature Request: Refrain from providing middle mouse button scroll lock
Firefox Development
feedback ,  issue
1 39 September 12, 2024
Any Chance Tab Groups Will Ever Come?
Firefox Development
55 18970 September 12, 2024
Request for Review and Publication of Submitted Extension (CalSyncMaster)
Add-on Support
7 99 September 12, 2024
Reinstating the Language Representative Program
Common Voice
5 143 September 12, 2024
Audio Data Issue: Empty Audio File in Common Voice Dataset
Common Voice
13 241 September 12, 2024
Page action crashed firefox
Development
4 125 September 12, 2024
How long does it usually take for a submission to get approved?
Add-on Support
8 164 September 11, 2024
Per-container proxies do not work for me at all
Firefox Containers
issue
1 41 September 11, 2024
Cache2 File Name Hash
Developer Community
2 721 September 11, 2024
Happy BMO Push Day! (20240910.1)
Firefox Tooling Announcements
1 55 September 10, 2024
Moz-Phab 1.6.0 Released
Firefox Tooling Announcements
1 51 September 10, 2024