Mozilla Discourse

Topic	Replies	Views	Activity
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…	5	14128	September 6, 2023
Mozilla splach page challenge issue/responsive images chapter non included in html course? Learn learning , issue	1	8	May 16, 2025
Firefox Profiler Deployment (May 15, 2025) Firefox Tooling Announcements firefox-profiler	0	6	May 16, 2025
[Support] Brief Add-on Support	316	38757	March 11, 2024
Why does Firefox keep disabling the KEEPER add on? Add-ons	2	27	May 16, 2025
WebExtError “unsupported filetype” when trying to sign a locally built extension addons.mozilla.org	6	50	May 16, 2025
Bun support on MDN? MDN	1	30	May 15, 2025
Is it possible to access native workspaces/desktops? Development	1	16	May 15, 2025
Roll Call! North America	13	2519	May 15, 2025
Mail Merge add-on crash Add-ons issue	2	14	May 15, 2025
Spontaneous Speech Mode is Coming to Common Voice Common Voice	0	20	May 14, 2025
How to download with a script the full CommonVoice21 dataset? Common Voice learning , issue	4	59	May 14, 2025
Common Voice 21 dataset now available Common Voice dataset	4	155	May 14, 2025
Happy BMO Push Day! (20250513.1) Firefox Tooling Announcements	0	8	May 13, 2025
Recent bug with validation? addons.mozilla.org issue	1	22	May 13, 2025
Is there a way to create an automatic theme? Themes	2	31	May 13, 2025
"Media resource could not be decoded" in extensions Development learning , issue	9	47	May 13, 2025
My addon has been waiting review since April 26, 2025 Add-ons	1	26	May 12, 2025
[Support] uMatrix Add-on Support	194	70716	May 12, 2025
New Deploy of PerfCompare May 9, 2025 Firefox Tooling Announcements perfcompare	0	23	May 9, 2025
Unable to resize developer panels : Wayland Developer Tools	2	26	May 12, 2025
ModHeader extension is not available in firefox Add-ons	5	3221	May 9, 2025
Email received from Mozilla Monitor - spoof or more? Security	3	1861	May 9, 2025
Can I set the font with firefox web developer tools? Developer Tools	11	17068	September 17, 2023
Distributing Unlisted extesnion via direct link Development	2	34	May 8, 2025
Firefox Not Browsing At All On Windows 11 Firefox for Android Add-ons	2	22	May 12, 2025
Mozfest 2025 Calls for Participation now open! Common Voice	0	21	May 7, 2025
Add link to tab group by holding link over existing tab group Common Voice	1	11	May 7, 2025
Use of "autofocus" in popup.html not consistent Development	1	25	May 6, 2025
Tab group support in Firefox 138 Announcements	3	81	May 6, 2025

Get started with Firefox extension 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…