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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 10758 September 6, 2023
Compiler-generated add-on code: Unsafe assignment to innerHTML
Development
3 44 May 12, 2024
Add AutoControl extension
Add-on Support
1 26 May 12, 2024
Weird Tabstop Key behaviour?
Firefox Development
2 25 May 12, 2024
Firefox Limit of 50 SAN Cert Entries
Firefox Development
2 37 May 12, 2024
Firefox InternalError (MV3)
Development
manifest-v3
6 62 May 11, 2024
Remote access service
WebThings
4 57 May 11, 2024
Compress but not enough space
Thunderbird
2 46 May 10, 2024
Emergency remediation for Thunderbird extensions
Add-on Support
3 52 May 10, 2024
MS Start Headache
Common Voice
9 96 May 10, 2024
How to avoid linter warnings caused by limited Android API?
Development
2 53 May 10, 2024
Web Requests created by extension are no longer logged in the Developer Toolbox
Development
1 46 May 9, 2024
Search option to find text in PDF files
Add-ons
1 45 May 9, 2024
MobiDevTools implementation of Eruda 3.0.1
Add-ons
6 99 May 8, 2024
Remove duplicate messages Thunderbird (largeur partie gauche fenêtre doublons)
Add-on Support
1 67 May 8, 2024
Ability to detect name of active webform control?
Development
1 58 May 8, 2024
How do I debug Firefox on iOS?
Developer Tools
learning
6 7767 May 8, 2024
Will users of old browser automatically see the latest compatible version?
addons.mozilla.org
5 417 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
3 410 May 8, 2024
Korrektur von vergebenen Bewertungen durch User --> Verbesserungsvorschlag
Add-on Support
2 73 May 8, 2024
Choosing Origin header from background script
Development
issue
4 166 May 8, 2024
Post-MV3 versioning for "cross-browser" extensions?
Development
manifest-v3
4 255 May 8, 2024
Add-ons that break Websites & Add-on Management
Add-ons
6 169 May 8, 2024
Https://webthings.io/ Is inaccessible again
WebThings
5 102 May 7, 2024
[Support] Sage-Like - Sidebar Based RSS Feed Reader
Add-on Support
69 9855 May 7, 2024
Weekly Update Thread - 2024
Common Voice
13 546 May 7, 2024
Schema Learning
Learn
learning
2 666 May 6, 2024
"What is ..." - voice tech terms explained (in 1 minute)
Common Voice
1 45 May 6, 2024
My replies to reviews are getting deleted
addons.mozilla.org
11 358 May 6, 2024
Is there any extesnion avialnle in firefox which can block website categroy wise
Add-on Support
1 69 May 6, 2024