Is Multiple Tab Handler safe?

Select multiple Firefox tabs by dragging and apply tab actions from a menu.

This extension adds a panel for selecting tabs with a drag action, then lets you run commands from a menu similar to Firefox’s tab context menu. It can also close multiple tabs by dragging over close buttons and can work with Tree Style Tab for selecting tabs in the sidebar. Its permissions allow access to tab information, menus, storage, notifications, cookies, contextual identities, and the active tab.