The first occurence of the Fireprobe® speed test in the Wayback Machine is April 2020.
Fireprobe® is a mainstream speed test. In other words, the results are in line with the advertised speed.
A nice feature of this speed test is that after the test it is shown what the measured speed is good for.
However, with 35 seconds to complete, the knockout criterion of 30 seconds has not been met. Hence this speed test is not recommended.
Fireprobe® is one of the registered trademarks of V-Speed sp. Z oo. They offer you to get the speed test application for your website for free.
In the speed test overview you find all findings regarding the Fireprobe® speed test.