Firefox remains the most balanced choice for on KitKat.
Always verify APK checksums and scan files with antivirus software before sideloading. Mozilla does not officially distribute older versions, so user caution is paramount. Mozilla Firefox Apk For Android 4.4 2
: The standard "direct login" for Sync may not work on this version. You may need to manually visit Firefox Accounts within the browser to sync bookmarks and passwords. Modern Alternatives Firefox remains the most balanced choice for on KitKat