First I would like to congratulate your work with the plugin. Is simply excellent!
I would like to make a suggestion: Put an option light / dark to the Facebook option.
Other systems apparently adapt by themselves or are controlled by CSS of the site, but the Facebook plugin has the option Light and Dark. One of my sites is dark and every time the plugin is updated I have to manually edit the facebook.php just to replace the light (which is the default) to dark.