https://www.health.ny.gov/vital_records/genealogy.htm

If you are sure that Morris Brown emigrated from "Russia", it would be most helpful to narrow that down to a more specific geographic area and town location within greater Russia, so that you could eventually find other families from that town to whom the Browns may have been related.

The cemetery where Morris was buried in Albany could also provide a clue to his geographic origins, as would membership at any synagogue or other Jewish organizations in Albany. 

However, most of the Jewish immigrants to Albany came from Germany or Western European countries during the time period when Morris immigrated. See online sources  for histories of the Albany Jewish community and congregations. 

Whether your Browns came from somewhere in Russia or Western Europe, it's unlikely that their surname would have been spelled "Brown" unless they had lived in an English-speaking country for a time. The original name could have been similar to Brown or even a totally different name. 

If you can find living Brown family descendents and communicate with them, you may find clues to the past. There *are* people who knew relatives born as long ago as the 1880's. I have found success in expanding my ancestral surname list through the discovery of a family branch and contact to previously unknown cousins. They say they "have no clue", but there is usually something in their family memory that is helpful, even if not documented. And it turns out that the previously unknown branch didn't settle very far from my family upon arriving in the USA. 

Nancy Seibert 
Rhode Island