Don't use /c/foo, use c:/foo/. The latter works fine and there are parts of the toolchain (at least MOZ_OBJDIR) that interpret the former incorrectly: as a directory "foo" that's a subdirectory of "c" which is a directory in the root of the current drive
In "Ways to start the debugger" section, add an "Attach the debugger to an existing Mozilla process..." item with instructions.
Why does MDN look different?
MDN is changing to focus just on documenting web technologies. All the same great content is still here; we’re just changing some visual elements and navigation, to help you more quickly find the web technology docs you’re looking for.
But don’t worry, MDN and Mozilla are still together! In fact, we're updating MDN’s look to reflect Mozilla's new logo and colors.