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EPUBReader vs FBReader: catalog facts
EPUBReader	FBReader
Free Free to install.	Freemium The reader is free. Some format plugins and premium features are paid.
Browser extension	Windows, macOS, Linux, Android, iOS
Works in Firefox, Chrome, Opera and Edge Opens books in place without copying them	Same library and reading position across desktop and mobile Reads custom OPDS catalogues as well as local files
Does not open DRM-protected ebooks Read-aloud needs a separate extension	Some features and formats need paid add-ons The desktop builds lag the mobile apps
Browser extension	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.