Thunderbird now has a built-in PDF viewer, which means you can read and even do some editing on PDFs sent to you as attachments. You can do all this without ever leaving Thunderbird, allowing you to return to your inbox without missing a beat.
Thunderbird 现已内置 PDF 查看器，这意味着您不用离开 Thunderbird 就可以直接阅读邮件中的 PDF 附件，甚至可以对其进行简单编辑。