Uhm what? I am not sure who you are trying to talk about here, but it is a complete fiction.
The "Arabs" of that ancient era are not the Arabs of today. In the era of antiquity the term was an alternate label for the Bedouins. And the Bedouins were not traders, they were shepherds. It was not until after the rise of Islam that they started to settle into cities and moved from nomadic herdsmen to city dwellers and traders.
It must be remembered, the Arabs are simply another Semitic group, one of many. The "Arabs" of today are primarily those Semitics that in the 7th and 8th centuries converted to Islam then remained in the area. And a huge number of "Arabs" are genetically Jews, they simply are the descendants of those who had changed religions over a thousand years ago. And with the rise of Islam, they largely adopted the identity of the Bedouins as almost all Semitic cultures had been idolizing them and identifying with them for thousands of years as they were all essentially "domesticated" offshoots of that older culture.
But no, they were not trading with the "Pharaohs", as "Arabs" as the term we recognize did not even exist yet. And those people that the modern groups claim descent from were not traders of any sort. Those were the Judeans, the Hasmonians, and other Semitic groups (those that are more closely identified as being "Jews" rather than "Arabs").
And Pharaohs? When in the hell would that have been? They were gone by the 4th century BCE. But by that point the Pharaohs had barely been Egyptian for hundreds of years.
And obviously you know even less history. Hell, the Arabs of Antiquity had no interest in Frankincense other than trading locally as it was often used as form of currency. Trade your slow moving and high labor sheep for frankincense at one end, and then return to your starting point and trade that for even more sheep. The Bedouins had no interest in settling down in cities, or engaging in commerce or industry. And many still live like that even to this day.
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