Sefardim & Chasidim celebrate Lag Baomer and light fires.”
Seems, non Chasidic Ashkenazim have no such Minhag .(in E.Y.)
The Minchas Elozor 4-60 (Chasidic Rebbe) writes “ Lag Baomer
celebrations (music & dancing etc.) are only for Bnei Eretz Yisroel.
In Chutz La'aretz these celebrations are strange and haughty .
כזרות יחשב וכיוהרא “
celebrating Lag Baomer.
Not to deviate from your Minhagim & Mesorah, means
you don't search for & follow new Minhagim, your
parents/ grandparents haven't heard of or done so.