On laptops the game often runs on the weak integrated GPU. Force your dedicated one for far more FPS:
Windows
- Settings → System → Display → Graphics (or search "Graphics settings")
- Browse → add your browser's
.exe (e.g. …\chrome.exe)
- Click it → Options → High performance (your GPU) → Save
- Fully quit & reopen the browser. Plugged in + "Best performance" power mode helps.
macOS
- Apple Silicon (M-series): a single GPU — nothing to switch.
- Intel MacBook Pro: System Settings → Battery → turn off "Automatic graphics switching"; avoid Low Power Mode.
Linux
- NVIDIA (PRIME): run the browser with
prime-run, or set __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia
- AMD / Intel hybrid: launch with
DRI_PRIME=1