Thank you for the very nice add-on. it's very useful. But one thing as a sorry point is that the shortcut key is not editable for now. I have set it in the past, and it has been kept but it doesn't function. I can't find any buttons like 'Edit' despite that I can see the list of shortcut keys. Further, the shortcut key also doesn't work now(I have to 'click' the icon). Due to the settings of the FIrefox's security?

p.s. It seems like shortcut keys conflict among some add-ons in my choices. It can be resolved with the editor for the shortcut key if it works.