Comment by bno1

Why not use mingw64 which is actively maintained instead of some ancient visual studio version? It certainly looks possible [1]. Taking a look and Pale Moon's dev page [2] I see that they are using VS2012.

[1] https://developer.mozilla.org/en-US/docs/Mozilla/Developer_g... [2] https://developer.palemoon.org/Developer_Guide:Build_Instruc...