FlowReader

FlowReader is a local-first reading workspace for long-form content. Save
articles and web pages, read with a focused reader, and keep your archive on
your own device.

Reading modes include bionic reading, word and sentence pacing, RSVP, and
auto-scroll. FlowReader imports articles, PDFs, EPUBs, and other documents.

KEYRING: FlowReader stores account and provider secrets in the desktop secret
service (GNOME Keyring, KWallet). Under strict confinement that needs the password-manager-service interface, which does NOT auto-connect. Until it is
connected, every secret FlowReader writes is lost on exit and signing in fails
with a storage error. Connect it once after installing:

sudo snap connect flowreader:password-manager-service

See https://snapcraft.io/docs/password-manager-service-interface