This feature displays a button on the console’s command line that lets you change the context in which the expression you enter will be executed. See <a data-l10n-name="bugzilla1">bug 1605154</a> and <a data-l10n-name="bugzilla2">bug 1605153</a> for more details.
此特性会在控制台的命令行显示按钮，让您可以切换执行所输入表达式的上下文。欲详细了解，请参阅  <a data-l10n-name="bugzilla1">Bug 1605154</a> 及 <a data-l10n-name="bugzilla2">Bug 1605153</a>。