Use a reputable source like APKMirror to find version 68.4.2.
Android 4.2.2 has not received security updates in nearly a decade. Firefox 68 is also no longer patched. Use this setup (news, forums, text-based sites). Do not do online banking or enter credit card information on this device. Firefox Apk Android 4.2.2
Opera Mini routes web traffic through its own cloud servers to compress data before it reaches your device. This process bypasses many modern rendering and encryption issues, making it highly functional on Android 4.2.2. Use a reputable source like APKMirror to find version 68
If you are looking for the APK or documentation for research: Official Archive: You can find every historical version on the Mozilla FTP Server Community Fixes: Sites like XDA Developers Use this setup (news, forums, text-based sites)
Most Android 4.2.2 devices use ARMv7 processors. Ensure you download the armeabi-v7a variant.