The Abu Dhabi side's coach is given some respite with victory over bottom side Kalba, while Al Shaab draw with Al Dhafra and Al Nasr see off Dibba.
Pro League round-up: Relief for Al Jazira and Luis Milla after victory
The Abu Dhabi side had won only once in 11 games, in three competitions, since Milla took over from Paulo Bonamigo in late February.
Milla's record now reads: two victories, five draws, five defeats.
Jazira were locked in a scoreless struggle until the 39th minute, when Ricardo Oliveira scored his 14th goal of the league season.
Two minutes later, Subait Khater, the veteran Emirati midfielder, made it 2-0, and the UAE international Ali Mabkhout got the third score seven minutes into the second half.
Amer Deeb scored a consolation goal for Kalba four minutes into added time, denying Ali Kasheif a clean sheet.
Jazira's victory moved them three points back of second-place Al Ahli, who play tonight.
Michael N'dri, the in-form French striker, scored twice for Shaab, who drew four points clear of the relegation zone.
Makhete Diop gave Dhafra an early lead with his 14th goal, but Faisal Khalil levelled for Shaab in the 32nd minute. Dhafra pulled ahead in the 38th on a tally by Mahmoud Awadh. N'dri scored either side of half time to give Shaab a lead it lost when Hassan Zahran's goal gained a point for Dhafra.
Bruno Cesar broke the deadlock right on half time to give the visitors the lead and Leonardo Lima looked to have ensured Nasr all three points when he struck with 20 minutes remaining.
However, they were forced to endure a nervy last quarter-hour after Alex struck for Dibba to reduce the deficit.
But Cesar got his second with three minutes remaining to seal the win.