I used to love this plugin back before Firefox 57.0. Unfortunately, the new version - due to limtations of the new API - is not as nearly as useful as the old one, but I will still rate it 5/5 for effort.
The right-click context menu is missing but it will be added soon. That feature in particular is not due to API limitation. Integrating cliget into the save-as dialog, however, is a WebExtensions limitation.
