Development

Topic	Replies	Views	Activity
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…	5	14607	September 6, 2023
About the Development category	0	4471	May 21, 2015
Taking screenshots from the "chrome" context	4	37	July 11, 2025
Possible regression in `browserSettings.useDocumentFonts` API in recent browser versions? issue	5	58	June 27, 2025
Localy stored backups - altenrative soltuions	0	55	June 13, 2025
Focusing on Tab Bar	13	102	June 14, 2025
Is it group.color to retreive Group of Tabs color a user have selected?	7	66	June 9, 2025
Dynamically adding elements to the updated sidebar	0	21	June 2, 2025
How to restore a recently-closed tab group via WebExtensions API	0	78	May 24, 2025
Deleting All Bookmarks in Folder (weird Fx bug?)	0	13	May 24, 2025
Manifest V3 Background Script Issue	1	45	May 21, 2025
Is it possible to access native workspaces/desktops?	1	33	May 15, 2025
"Media resource could not be decoded" in extensions learning , issue	9	151	May 13, 2025
Distributing Unlisted extesnion via direct link	2	48	May 8, 2025
Use of "autofocus" in popup.html not consistent	1	39	May 6, 2025
Initial tabs.hide() warning dialog	3	44	May 5, 2025
Manifest V3 issues for my extension	6	83	May 4, 2025
File input doesn't trigger "change" event in options UI on Android	2	49	April 30, 2025
How do you debug issues related to going idle? (mv3) manifest-v3	4	51	April 30, 2025
Suggested alarms / linux suspend workarounds?	2	38	April 30, 2025
Loading and displaying remote HTTP images in an extension learning , issue	2	60	April 29, 2025
Options_ui open_in_tab removes Options tab in about:addons?	1	38	April 28, 2025
If, on Android, "chrome_settings_overrides" is not supported, there is no way to add a custom search engine? search	3	1301	April 22, 2020
An addon to colour every tab individually	1	42	April 22, 2025
Test and debug extension on Android	1	25	April 21, 2025
Search function for buying products from Non-Profits/Charities learning	1	32	April 19, 2025
Search.query() practically doesn't work, presumably due to CSP when sending POST request	4	49	April 18, 2025
awaiting review for addon issue	3	59	April 14, 2025
Picture in Picture API?	4	66	April 13, 2025
Change specific cursor with addon learning	1	29	April 7, 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…