Salomon Breur was rabbi of the Israelitische Religionsgesellschaft ("Religious Society of Israelites") from 1890 to 1926, succeeding Samson Raphael Hirsch in this capacity. Breuer was born on 27 June 1850, in Szanto, Hungary. After studying at the yeshiva in Bratislava and at several German universities, he went on to take a doctorate in philosophy at Heidelberg. He married the youngest daughter of Samson Raphael Hirsch, upon whose death he became rabbi to the Israelitische Religionsgesellschaft in Frankfurt. He founded a yeshiva there, and was principal until his death.
Like his fatherinlaw, he was also a radical campaigner for secessional orthodoxy. He argued in favour of the separation and secession of orthodox circles from the Jewish community, provided a majority of members belonged to the Jewish Reform Movement. He fought with special vigour against orthodox Jews who had remained in the wider community, as if they were his personal enemies. He thus intensified conflict amongst Frankfurt Jews and hindered cooperation between the two Jewish communities in Frankfurt. The new synagogue of the Israelitische Religionsgesellschaft at the Friedberg site was consecrated during his term of office in 1907. It had 2,000 seats and was the largest synagogue in Frankfurt. During the pogroms on 9/10 November 1938 it was totally destroyed by the Nazis. The former site of the synagogue in Friedberg is today occupied by an old airraid shelter.