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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 10752 September 6, 2023
Weird Tabstop Key behaviour?
Firefox Development
1 7 May 12, 2024
Compiler-generated add-on code: Unsafe assignment to innerHTML
Development
1 21 May 12, 2024
Firefox InternalError (MV3)
Development
manifest-v3
6 53 May 11, 2024
Remote access service
WebThings
4 53 May 11, 2024
Compress but not enough space
Thunderbird
2 41 May 10, 2024
Emergency remediation for Thunderbird extensions
Add-on Support
3 43 May 10, 2024
MS Start Headache
Common Voice
9 92 May 10, 2024
Firefox Limit of 50 SAN Cert Entries
Firefox Development
1 26 May 10, 2024
How to avoid linter warnings caused by limited Android API?
Development
2 48 May 10, 2024
Web Requests created by extension are no longer logged in the Developer Toolbox
Development
1 41 May 9, 2024
Search option to find text in PDF files
Add-ons
1 40 May 9, 2024
MobiDevTools implementation of Eruda 3.0.1
Add-ons
6 97 May 8, 2024
Remove duplicate messages Thunderbird (largeur partie gauche fenêtre doublons)
Add-on Support
1 62 May 8, 2024
Ability to detect name of active webform control?
Development
1 56 May 8, 2024
How do I debug Firefox on iOS?
Developer Tools
learning
6 7756 May 8, 2024
Will users of old browser automatically see the latest compatible version?
addons.mozilla.org
5 415 May 8, 2024
How do I go from self-distributing an add-on to having it hosted on the add-on store?
addons.mozilla.org
3 370 May 8, 2024
Korrektur von vergebenen Bewertungen durch User --> Verbesserungsvorschlag
Add-on Support
2 70 May 8, 2024
Choosing Origin header from background script
Development
issue
4 161 May 8, 2024
Post-MV3 versioning for "cross-browser" extensions?
Development
manifest-v3
4 251 May 8, 2024
Add-ons that break Websites & Add-on Management
Add-ons
6 167 May 8, 2024
Https://webthings.io/ Is inaccessible again
WebThings
5 101 May 7, 2024
[Support] Sage-Like - Sidebar Based RSS Feed Reader
Add-on Support
69 9848 May 7, 2024
Weekly Update Thread - 2024
Common Voice
13 537 May 7, 2024
Schema Learning
Learn
learning
2 661 May 6, 2024
"What is ..." - voice tech terms explained (in 1 minute)
Common Voice
1 43 May 6, 2024
My replies to reviews are getting deleted
addons.mozilla.org
11 354 May 6, 2024
Is there any extesnion avialnle in firefox which can block website categroy wise
Add-on Support
1 67 May 6, 2024
Image gallery ALT text issue
Learn
1 75 May 5, 2024