Write to me.
Fastest is Discord. Bugs are better on GitHub, there they do not get lost. Prefire is made by one person in his spare time, so answers are not instant, but every message gets read.
Discord is the main one
Questions, ideas, "why is it empty on my lobby". Usually I answer the same day. Other users are in there too and often answer faster than I do.
Where to write about what
Privacy and removing your data
Prefire has no accounts. Your settings live on your machine and disappear with the extension. What the server does keep is scouting profiles built from public match records.
Any player can have their profile removed, whether they use the extension or not. Write to prefirecsdev@gmail.com from any address, name your FACEIT nickname, and I will confirm when it is done. The full procedure and the retention periods are in the Privacy Policy.