Why are you running pipewire? I though that mint didn't ship with it by default?
Anyway try this:
- Type 'about:config' in the address bar, accept warning and press Enter.
- Disable speech-dispatcher in reader-mode (show only text of an html document) because it injects a nasty noise: Find 'media.webspeech.synth.enabled' and set it to 'false.'
You should be able to list all subvolumes with
sudo btrfs subvolume list /
. From their you can use the btrfs snapshot command to take a snapshot.sudo btrfs subvolume snapshot / test