Yeah, in fact. The Linux kernel does use proprietary software (Blobs) for it to run. Or stuff to function like Bluetooth and shit like that.

Idk, just a Twitter post I found.

Alright, yeah, I’m using KDE. I don’t recall downloading anything, like clam AV, ever.

I knew that .db stood for Database.

Likewise, I guess this could be, like you said, some sort of program I previously installed that checked for a list of URLs that are malware. Again, I have never installed any program like these, and if I did, I would probably delete it after a minute of checking it out lol.