Why are font styles not working in Firefox?

Question

css

For some reason, Firefox understands only the fat content of 400 and 700, and the rest do not work. Although in other browsers the same layout is displayed correctly. I connect fonts through font-face. Do you know what could be the problem?

Answer 1

Are the outlines all connected?
Are the properties inside font-face spelled correctly?
Are all paths correct?
Can you show me the code???????