No worries - If you add the wayland arguments it will fix the bluriness:
Instructions here: Signal aarch64 Flatpak
You’ll notice under tips and tricks:
Tips & Tricks
- Signal will be blurry on phosh (pinephone, Librem 5) becacuse of Xwayland scaling. To fix, run with wayland using these arguments: --use-gl=egl --enable-features=UseOzonePlatform --ozone-platform=wayland. Signal must be opened at least once in X11/Xwayland first (just by clicking the launcher) first.
- To add the above to the launcher shortcut: copy /var/lib/flatpak/app/org.signal.Signal/current/active/files/share/applications/org.signal.Signal.desktop to ~/.local/share/applications/ and change the Exec line to this: Exec=flatpak run org.signal.Signal --use-gl=egl --enable-features=UseOzonePlatform --ozone-platform=wayland
- Use the View menu item to zoom out a few times. It makes Signal much less cramped.
- Ctrl+Shift+c will close the current conversation and reduce idle CPU usage significantly.
- Notification sounds and mic/camera usage can be enabled in settings.