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…	4	4320	June 20, 2022
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	8295	June 23, 2021
About the Development category	1	3049	May 21, 2015
Errors using webextension-polyfill to make a cross-browser add-on	2	26	August 8, 2022
Need more advice on non-persistence	4	55	August 8, 2022
Firefox Android address bar overlaps content after exit fullscreen issue	1	45	August 6, 2022
Browser crashes when modifying browser action popup with javascript	8	87	August 5, 2022
Can we check which action (key combination/click) was used to open the browser action popup? learning	4	84	August 5, 2022
Open url in microsoft edge (context menu)	5	121	August 4, 2022
Self hosted extension only downloads, Firefox does not ask for install	2	91	August 3, 2022
Extension upload development	1	2	August 3, 2022
"Access to the file was denied" on extension's page refreshing webextensions-api	1	48	August 2, 2022
Add-ons shortcuts (commands API) does not work on non-english keyboard layout issue	5	187	August 2, 2022
Privacy and Accessing a database keyed by domain name development , privacy-and-security	2	92	August 1, 2022
How to build external app lanucher	1	71	July 28, 2022
window.getSelection() and browser.commands.onCommand.addListener	3	1279	July 27, 2022
Is there a way to split the browser action popup in tabs, as if it were an external page (window)? learning	6	122	July 27, 2022
XMLHttpRequest fail with header CORS “Access-Control-Allow-Origin” missing error issue	11	405	July 23, 2022
Content Security Policy issue on inline script	2	112	July 21, 2022
Pyscript not working on firefox extensions	11	307	July 21, 2022
How can I keep AddOn preferences when switching from "Temporary AddOn" test version back to installed signed version?	5	146	July 19, 2022
Web-ext and Firefox Ubuntu 22.04 (snap)	2	152	July 15, 2022
MV3 - Cannot get content script to run in Firefox! No errors and no loglines to be found!? manifest-v3	5	204	July 14, 2022
Cannot get API Credentials for testing on addons.allizom.org	1	124	July 11, 2022
XPath Behaves Differently in Inspect Console & Extension	5	193	July 10, 2022
Extensions using content scripts without any user action wont work anymore in MV3 manifest-v3	7	341	July 10, 2022
I don't see any option to debug the sidebar code	6	683	July 6, 2022
Unable to run java code within addon window	6	389	July 1, 2022
"Cannot access dead object" error when reading an user object set by popup within the background page object	5	212	June 26, 2022
[SOLVED] SVG path does not show	5	207	June 23, 2022

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…

4

4320

June 20, 2022

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 …