Downloading the is the best way to ensure a smooth installation without an active internet connection during the setup process. This version of the browser is specifically built for web developers, featuring experimental tools and features that are typically 12 weeks ahead of the standard Firefox release. How to Download the Offline Installer
: Navigate to the Firefox Developer Edition platforms page. download firefox developer edition offline installer
The standard web installer works well for a single machine with a stable connection, but the offline (standalone) installer offers several advantages: Downloading the is the best way to ensure
: Select your preferred language from the list. The standard web installer works well for a
To avoid the standard "stub" or "net" installer—which is just a small file that downloads the rest of the browser during installation—you must use the page.
: Choose Firefox Developer Edition from the "Which browser" dropdown menu.