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	12618	September 6, 2023
About the Development category	1	4316	May 21, 2015
Extension development tools developer-tools Hi all, I’m excited to share some tools that community members have recently created to help with extension development. If you’ve built something that could be helpful to others, please let us know by replying to this …	6	10832	June 23, 2021
Code in content_scripts not executed when document changes?	1	33	December 1, 2024
What version of Android Firefox added support for MV3?	4	191	November 30, 2024
Error testing addon with web-ext in Android. Unable to retrieve current user	5	103	November 29, 2024
Extension for block ads does not work as it should	4	101	November 28, 2024
declarativeNetRequest - dynamic rule not resulting in a redirect	3	156	November 25, 2024
Clicking on notification from MV3 extension has no effect if background script suspended	8	275	November 23, 2024
Options.html (as popup) & file picker	4	145	November 22, 2024
Content.js now need permissions on each matching URL	11	287	November 13, 2024
"Unsafe assignment to innerHTML" workarounds	5	318	November 7, 2024
Can web requests that sending in background script use the cache that set by web pages?	2	364	November 7, 2024
Detect when a Ctrl+F result is inside an iframe	10	371	October 28, 2024
CORS Policy for Addon request	4	205	October 28, 2024
Looking for workaround for PDF viewer "content script restriction" issue	3	757	October 22, 2024
Manifest V3 validation tools? manifest-v3	5	5219	August 18, 2022
Does Firefox extends events page lifetime when I run a `fetch`?	2	216	October 17, 2024
Downloading items from direct download links with browser.downloads.download()? issue	8	561	October 16, 2024
Is the package @types/firefox-webext-browser maintained by Firefox team?	4	313	October 15, 2024
Dark theme_icons are ignored in Manifest v3 extension	9	1166	October 10, 2024
Browser extension storage "get" return value if nothing found	5	364	October 9, 2024
How to prevent the options page from being draggable?	3	264	September 26, 2024
How to detect an element which is editable by the user feedback	9	1577	September 18, 2024
Suspicious extensions analysis	1	250	September 17, 2024
Page action crashed firefox	5	357	September 17, 2024
Issues with Mozilla DevTools Debugger in Large Codebases?	2	287	September 17, 2024
Error: filename must not contain illegal characters	2	4093	September 13, 2024
How to stay on ESR 115 branch till March 2025?	2	371	September 9, 2024
Does Firefox MV2 extension has a deprecation timeline?	4	1702	September 5, 2024

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

12618

September 6, 2023

About the Development category

1

4316

May 21, 2015

Extension development tools

developer-tools

Hi all, I’m excited to share some tools that community members have recently created to help with extension development. If you’ve built something that could be helpful to others, please let us know by replying to this …