What surprised me the most is that URL components can contain encoded slashes (%2f). I tried replacing some of the slashes in my open tabs with %2fs. Some sites

What surprised me the most is that URL components can contain encoded slashes (%2f). I tried replacing some of the slashes in my open tabs with %2fs. Some sites treat them as path separators, some don't and some treat them differently depending on which components they appear between.