According to my tests, having the context menu in the popup object alters the page's tree of elements and this seems to have repercussions on the View Source window; it just doesn't show up.

按照我的测试，在弹出对像中包含快捷菜单改变了页面的元素树并影响查看源代码窗口，不能显示。

youdao

If the popup menu doesn't show up, check whether the extension "Adblock" (if installed) is the source for the problem.

如果弹出的菜单没有显示，查看一下扩展“Adblock”(如果安装了的话)是不是问题的根源。

youdao