DEV-Tools 作成者: Juniper

the addon-"DEV-Tools"-devtools-panels **Adds a new sidebar to the developer tools inspector.**

Function:-

This addon adds a new sidebar to the inspector panel.
It displays the properties of the current selected node in the markup view, using
`sidebar.setExpression($0)` each time a new node is selected (listener added via
`browser.devtools.panels.elements.onSelectionChanged`).