Thanks a ton for the review and for sharing your thoughts! Glad you're enjoying it :)

Firefox doesn’t let extensions set the “Homepage and new windows” setting directly (only the New Tab page).
You can workaround this if you'd like by setting it manually:
1. Open a new tab so your Cyberpunk homepage appears.
2. Bookmark that page.
3. Go to about:preferences#home (you can paste this in the address bar to go there directly or navigate there by going to Settings > Home > Homepage and new windows).
4. Under Homepage and new windows, choose Custom URLs… and select your bookmark.

Please let me know if this isn't the problem you are referring to and I'll do my best to help. You can contact me directly at suggestions@teallogic.com.