No quite. You need use File::Glob qw( glob );. Builtins aren't overridden unless explicitly imported.

$ perl -le'                           print for glob "a b"'
a
b

$ perl -le'use File::Glob;            print for glob "a b"'
a
b

$ perl -le'use File::Glob qw( glob ); print for glob "a b"'
a b
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