Since you cannot download this version from the Play Store, you must source it from an archive. Always use reputable sources to ensure the file has not been tampered with:
on Android 4.4.2. The lack of TLS 1.3 and modern certificate validation exposes you to man-in-the-middle attacks. Mozilla Firefox Apk For Android 4.4 2
Many older browsers struggle with modern security certificates. Since you cannot download this version from the