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	13802	September 6, 2023
About the Development category	0	4436	May 21, 2015
Modifying/Removing CSP header V3 learning , issue	2	25	March 26, 2025
Content Encoding Error	0	5	March 26, 2025
onBeforeRequest Blocking & Redirecting issue	0	16	March 25, 2025
Menu context "page_action" in an MV3 extension	1	20	March 23, 2025
<all_urls> doesn't grant access to all urls upon installation	2	32	March 23, 2025
Feedback gathering: Firefox Devloper Tools for Add-ons	1	22	March 18, 2025
People never trust mozilla or slimbrowser again!	3	64	March 16, 2025
Race condition when updating addon overriding New tab page	9	72	March 13, 2025
Absolute/relative position of FF UI urlbar	0	16	March 12, 2025
Why is getting started SUCH a chaotic mess?	3	54	March 12, 2025
Allowing strict_min_version value of 115.13	1	30	March 8, 2025
Picture in Picture API?	3	36	March 5, 2025
Rerun addon's script on URL dynamic change	4	2764	March 1, 2025
Accessing navigator.getBattery from extension context	1	19	February 25, 2025
I can't put my organization's policies in the background script learning	4	42	February 21, 2025
Actually setting a new folder color and color coding of emails	1	21	February 18, 2025
Problem Accessing GLTF Asset in Production Firefox Add-on with browser.runtime.getURL learning	3	30	February 12, 2025
Hyperlinks on Options page don't respond to middle-click	4	31	February 11, 2025
Shipping large model files (10MB) learning , development , issue	3	40	February 6, 2025
Access to "Protected" sites (e.g. accounts.firefox.com)	2	69	January 28, 2025
How to change AddOn ID?	3	237	January 23, 2025
How to automate add-on option screen tests?	6	138	January 22, 2025
Add button to toolbar/addressbar?	1	144	January 22, 2025
Browser extension storage "get" return value if nothing found	10	665	January 22, 2025
How to make extension available for Firefox in Ubuntu	1	90	January 22, 2025
Modify headers with declarativeNetRequest.updateSessionRules()? issue	6	1126	January 20, 2025
Is it allowed for an extension to load CSS and HTML dynamically?	3	185	January 19, 2025
Filtering of service worker scripts via browser.webRequest.filterResponseData not possible?	4	1096	January 17, 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…