The portable launcher allows you to run the browser out of a single folder on Windows 8.1 without system installation.
Any chance for the new DuckDuckGo browser becoming one of your portable apps? ( It's now an open beta) PortableApps.com
To investigate the validity, security risks, and technical feasibility of the search query requesting a portable version of the DuckDuckGo browser for "Windows 81" (interpreted as Windows 8.1).
Download . This is the final version of Firefox that officially supports Windows 8.1.
The Best Workaround: Portable Privacy Browsers for Windows 8.1