Avoid third-party "driver download" websites. They often bundle malware or outdated files. Only use official sources.
Look specifically for the (or V6) version in the description to ensure it matches your hardware. How to Upgrade Your Tenda F3 V6 Firmware Follow these steps to safely update your router: Tenda F3 V6 Firmware
What’s new / notable in V6 (typical)
If your Tenda F3 V6 is experiencing the following, an update is the best fix: Avoid third-party "driver download" websites