The 23-year-old's arrival coincided with Orient's recent upturn in form, but although boss Geraint Williams was eager to keep him on, the Foxes have opted to recall him.
"Nicky has been fantastic and he's enjoyed his time down here," said Williams. "He wanted to stay and we wanted him to stay but Leicester, as is their right, wanted to recall him."
Defender Briggs, 18, has gone back to Fulham after making one appearance - in the win over Yeovil.
Source: Team Talk
Source: Team Talk