. Since Mozilla and Google Play have long since dropped support for this operating system, you cannot install modern versions of Firefox on it. Mozilla Support Download and Installation

An older, lighter alternative if version 68 is too resource-heavy for your hardware. Firefox Lite

The (version 68.11.0) is the gold standard for browsing on legacy KitKat devices. While it is no longer updated, it provides a secure, fast, and extensible experience compared to any other browser that still supports this vintage Android version.

Use your existing browser to download the Firefox 68.11.0 APK from one of the links above. Find the File: