避免使用file:///进行开发-您会浪费时间进行调试，因为并非所有功能都应该在那里工作.

Avoid developing using file:/// - you'll waste time debugging, as not everything is supposed to work there.

如果是Firefox中的Worker()，则是一年前得到支持，但显然在Firefox 68中已禁用.

In case of Worker() in Firefox, this was supported a year ago, but was apparently disabled in Firefox 68.

请参见

See Firefox 68: local files now treated as cross-origin; is there a way to override? - if you set privacy.file_unique_origin to false in about:config, the example should work.