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…	6	15518	September 30, 2025
About the Development category	0	4496	May 21, 2015
[Manifest V3] background script stopped when signed extension is up	2	10	October 15, 2025
WebExtension API support for web app windows	3	68	October 10, 2025
IDEA - Add Unsubscribe Footer thunderbird	0	22	October 5, 2025
Validation says data_collection_permissions missing, but exists in manifest? issue	2	101	September 20, 2025
Do older Firefox versions ignore "data_collection_permissions"?	1	41	September 19, 2025
Do extension settings reference or depend on the extension's internal uuid?	2	19	September 19, 2025
Can we access location of new tab wallpaper?	2	31	September 15, 2025
License: This field, or custom_license, is required for listed versions	3	44	September 12, 2025
Error when use web-ext with chrome with `--keep-profile-changes`? issue	3	52	August 29, 2025
How to restore a recently-closed tab group via WebExtensions API	2	164	August 28, 2025
Does web-ext not load extension when use with Chrome? learning , issue	3	38	August 28, 2025
WebExtError when signing but still succeed? issue	1	30	August 25, 2025
What happens to storage when a user updates the extension? updates	1	45	August 17, 2025
Accessing closed tab groups	4	107	August 11, 2025
Deleting All Bookmarks in Folder (weird Fx bug?)	8	98	August 8, 2025
Any idea to create new window in correct position in 3200x2000 with 200% scale?	3	47	August 6, 2025
Where did `firefox-storage-test.glitch.me` go?	2	55	August 5, 2025
scripting.messageDisplay.registerScripts() are called twice?	5	69	August 5, 2025
How do you get type hinting for webext APIs in VSCode without using bundlers?	5	864	July 25, 2025
Dynamically adding elements to the updated sidebar	1	51	July 22, 2025
Firefox extension popup sometimes needs to be clicked on to detect keyboard inputs issue	2	54	July 22, 2025
Taking screenshots from the "chrome" context	4	65	July 11, 2025
Possible regression in `browserSettings.useDocumentFonts` API in recent browser versions? issue	5	75	June 27, 2025
Localy stored backups - altenrative soltuions	0	61	June 13, 2025
Focusing on Tab Bar	13	160	June 14, 2025
Is it group.color to retreive Group of Tabs color a user have selected?	7	86	June 9, 2025
Manifest V3 Background Script Issue	1	70	May 21, 2025
Is it possible to access native workspaces/desktops?	1	38	May 15, 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…