What are those strange and mysterious scripts titled "[VM](XXXX " and where do they come from?
VM has no special meaning. It's a dummy name to help us to distinguish code which are not directly tied to a file name, such as code created using eval and friends.
为了标识不能和具体文件直接关联的脚本的虚拟名称，并不是真正的文件，例如 eval 方法所执行的脚本、匿名函数，脚本会被抛入Chrome调试器虚拟机中