Games like Firefly
Games like Firefly include Chill with You : Lo-Fi Story, Chill Pulse, Placid Plastic Duck Simulator, Cozy Time, and Bongo Cat. We matched them by the tags players give Firefly on Steam (Casual, Dating Sim, Time Management, Utilities, and Idler): closest matches first, and among equally close ones the better-known games.

Chill with You : Lo-Fi Story
Shared: Casual · Utilities · Idler

Chill Pulse
Shared: Casual · Utilities · Idler

Placid Plastic Duck Simulator
Shared: Casual · Collectathon · Cute

Cozy Time
Shared: Casual · Utilities · Time Management

Bongo Cat
Shared: Casual · Idler · Cute

Fischer's Fishing Journey
Shared: Casual · Idler · Utilities

Cookie Clicker
Shared: Casual · Idler · Collectathon

Fantasy Aquarium
Shared: Casual · Idler · Time Management

Matchmaking Inc.
Shared: Casual · Dating Sim · Time Management

your wife
Shared: Casual · Cute · 2D

Shelldiver
Shared: Casual · Idler · 2D

School Days
Shared: Dating Sim · Time Management · Immersive Sim

Bit Buddy
Shared: Casual · Collectathon · Utilities

Banana
Shared: Casual · Idler · 2D

Stardom 3
Shared: Casual · Dating Sim · Cute

Love Delivery
Shared: Dating Sim · Casual · 2D

Keep on Mining!
Shared: Casual · Idler · Relaxing

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Collectathon · Relaxing

Melvor Idle
Shared: Casual · Idler · 2D

The Sims™ 4
Shared: Dating Sim · Casual · Relaxing

Memory of Memorie : A Chill Story
Shared: Casual · Time Management · Utilities

Senren * Banka
Shared: Dating Sim · Casual · Cute

Typing Farmer
Shared: Casual · Utilities · Time Management

Chillquarium
Shared: Collectathon · Idler · Casual