https://bugs.winehq.org/show_bug.cgi?id=46028
--- Comment #2 from Jacek Caban jacek@codeweavers.com --- Recently Firefox mingw builds were moved to clang-based toolchain. clang has support for .pdb files: https://bugzilla.mozilla.org/show_bug.cgi?id=1475562 https://bugzilla.mozilla.org/show_bug.cgi?id=1497645
If we update our Gecko package, we could use that. The problem is that a number of interfaces we use in MSHTML (see nsifacei.idl file) were removed from upstream Gecko meantime, so updating is going to be hard.