This looks like a cipher or encoded message. Let me break it down.
Try right shift: f→g, y→u, d→f, y→u, w→e → gufue — no. Download- fydyw tjss ly lhm mharm mn tht qb a...
But "qb" would then be "is" if q→i (shift -8) and b→s (shift +17) — no. This looks like a cipher or encoded message
The string is:
If we shift each letter backward by 1: f→e, y→x, d→c, y→x, w→v → exc xv (not a word). Download- fydyw tjss ly lhm mharm mn tht qb a...