I've loved it in the past, but lately (as of 9-5-2024) the yandex results, have been to spam links that redirect to
go.cbro.win and then on from there.
I tested the Yandex by submitting the same image I was searching for, via saved file, and got "clean" results with no redirects. Either the add-on is tainted, or Yandex is feeding searches originating through the add-on, with spam. stay tuned.

Excellent, very useful