Brazil continued to create scoring chances and, with full-time closing in fast, Firmino tapped in at the back post as Neymar turning provider to seal victory.
Neymar scored a 51st minute goal to put Brazil up 1-0 against Mexico.
Mexico were much more aggressive in the first 15 minutes of the match, but Brazil were prepared for that.
Twelve minutes before half-time and Gabriel Jesus worked himself some space in the area, but shot too close to Ochoa, before Jesus Gallardo was on hand to clear the Manchester City forward's follow-up shot off the line.
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But the one that has got everyone hooked to their mobile phones is Nita Ambani's elegant classical style dance performance. A few days ago, the Ambani family hosted a grand Mehendi ceremony and pre-engagement bash in the city.
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Ocasio-Cortez shared an Instagram post during her campaign previous year that showed her hard a work behind the bar. But more recently, the 28-year-old was working as a bartender in New York City to help support her family.
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Incidentally, Durant will save the Warriors millions in salary and millions more in luxury tax payments by signing this way. Durant will likely become a free agent in 2019 and sign a multi-year deal starting around $38 million.
Guillermo Ochoa (Mexico): The keeper made a string of impressive saves, particularly in the first half, to keep his side in the game and has been outstanding throughout the tournament.
It was Brazil's 227th goal at the World Cup, meaning they overtake Germany as the all-time top scorers. It has been eliminated in the round of 16 in each of the last six World Cups and has been facing questions about the curse of the fifth game-el quinto partido-ever since falling in Brazil in that round in 2014. The idea was to score quickly and then manage the rhythm of the game.
His run across goal and clever backheel won Willian space, and the Chelsea midfielder only needed two touches to drive into box and lay the ball across for the world's most expensive player to slide home.
Substitute Miguel Layun was fortunate to escape punishment when he appeared to stand on Neymar's leg 20 minutes from time as the two clashed on the touchline, although the Brazil man's histrionics did not help his cause in convincing referee Gianluca Rocchi to brandish a card.
Neymar powered through and his low effort was diverted into the path of Firmino, who had the simple task of tapping into an empty net.