The above mentioned translation by ela1986 is made in Ostfrisian dialect, spoken in Germany.
The official Frisian language (to which also the flag points out) is spoken and written quite different. Ela1986 is aware of this already.
For reasons of accuracy, in my opinion you should replace the first translation with the this one.
"Tafoegje oan favoryten."
This way the website will be more like you probably want it to be.