Did you install LibreWolf system wide or user ?
System-wide
Do you have any network drives mounted? I've had experiences where a program fails to save or download and sometimes hangs if (1) I save to a mounted network drive, (2) I lose the mount for whatever reason, and (3) I try to download or save again and the program presumably attempts to access the last place it wrote to (the lost network mount).
No, I don't, but I appreciate the help
Tested here with LibreWolf installed with Flatpak system wide. Up to date Arch Linux, installed xfce4 and xfce4-goodies packages, logged in to the xfce-session, started LibreWolf from the menu, downloaded something to ~/Downloads. No issues.
So I probably fucked up something on my end
Maybe it is just your LibreWolf profile (in ~/.var/app/io.gitlab.librewolf-community/) that is giving troubles. You can create a new one with :
/var/lib/flatpak/exports/bin/io.gitlab.librewolf-community -P
and see how it fares.
Still happens
LibreWolf
Welcome to the official community for LibreWolf.
LibreWolf is designed to increase protection against tracking and fingerprinting techniques, while also including a few security improvements. LibreWolf also aims to remove all the telemetry, data collection and annoyances, as well as disabling anti-freedom features like DRM. If you have any question please visit our FAQ first: https://librewolf.net/docs/faq/
To learn more or to download the browser visit the website: https://librewolf.net/
If you want to contribute head over to our Codeberg: https://codeberg.org/librewolf