My reading progress
Days you have marked as read. This is stored in your own browser — nothing leaves your laptop and there is no account to create.
Keep this permanently
Marks live in this browser, so they survive closing the tab, restarting your laptop and coming back months later. What they cannot do on their own is follow you to a second device or survive clearing your browsing data. The link below is the fix: it carries your whole record in the address itself, so bookmarking it — or opening it on your phone — restores everything.