it spike my CPU ...suspicious , behavior similar to CPU miner

Doesn't work. Crashed my browser.

Suspicious high CPU usage, fans spinning at high rpm ... while everything is idle with no tab open.

This is impossible to adjust, it blocks and lets through as it pleases. I don't think it can work any worse.

technically great but for some reason it takes up all ram

Literally used an entire 8gbs on my pc to do, what I assume is, bitcoin mining or something.

Did not block redirects.