Thank you. I can't believe I haven't thought of that and it turns out the solution was that easy. It will take me some time to take the bookmarks out of folders they were thrown into, but at least I have them in browser now.

Thanks! This "Options" link is gray and looks like a continuation of the "Terms and Conditions" text. It could be made more visible

But the passwords are still there though... It's possible to bulk remove them, but still: it's not nice that such sensitive information is being imported without even asking...

@kitkaplan Settings > Browser > Default browser > Import bookmarks and data.