The goal of this add-on is provide a general look up tool in Firefox sidebar.
Currently, it support look up text from Google Translate, more look up services and customize service is coming soon.
Features: - Look up text from selection context menu - Look up selection text immediately (when the sidebar is open) - Support change look up service from sidebar directly - Enable/disable look up by selection event - Ctrl-Shift-U (Linux/Windows) / Cmd-Shift-U (macOS) for toggle look up sidebar
