The family of 46-year-old Ahdie Yazdanparast said they are devastated by her death at Venus Hair & Beauty in Stirling on Saturday.
Police have launched a murder investigation.
Relatives said in a statement: "Ahdie was a wonderful woman who was devoted to her family and spent every spare minute she could with them.
"She was hard working and entrepreneurial, and was well known in the city to the many patrons of her businesses. We are devastated by her untimely death which has left a huge void in our lives which can never be filled."
A man was also injured in the fire which began in the cellar of the Maxwell Place salon.
Both were taken to Forth Valley Royal Infirmary and Mrs Yazdanparast, who was separated from her husband, died in hospital on Saturday night.