How to View or Edit the Source Code of a Firefox Addon

Here's how to edit or view source code of a Firefox addon/extension by downloading XPI file or locating addon folder on local drive.

Firefox Add-ons For Application Security Testing

A comprehensive list of Firefox privacy and security settings - gHacks Tech News

Manage your extensions using the extensions button in the toolbar

Extension source viewer – Get this Extension for 🦊 Firefox (en-US)

How to View or Edit the Source Code of a Firefox Addon

Various extensions inexplicably not, or no longer, installable to Firefox on FreeBSD through the GUI to addons.mozilla.org (AMO) · Issue #468 · mozilla/addons · GitHub

View Page Source (Mobile) – Get this Extension for 🦊 Firefox (en-US)

Visual Studio Code for the Web

Firefox Add-ons For Application Security Testing