Oh gosh... Don't worry, your comment is already enough xD
The game saves in the browser too, tho some people lost their save files way back. No idea why, if it's related to the browser cookies or your Itch account. Either way, it's been months since the last time it happened so hopefully it won't happen to you either.
Btw if you want to skip to the point you were in the story (and not replay everything), you can just start a new game and interact with the window in Lianna's bathroom first thing. That you let you skip to any chapter you want.