It works as described ☺ Noté 5 sur 5 étoiles

But I have one proposal.
When the Megacomments sidebar is inactive, the appropriate sidebar icon is grey. But if the paricular site is commented/rated it is higly desired to know about this even when the Megacomments sidebar is inactive. So, I propose to color this icon in this case with another color. It is more important then to have green color when Megacomments sidebar is active - we see this without coloring.
I understand, that this will add some extraloading to computer - any host switching will require interaction with server. Therefore the user should be able to disable this option.
There is no reason to have this sidebar open all time only to know if the particular site has comments.
In other words I propose to distinguish between inactive/active sidebar and open/close sidebar - it might be active, but closed.
Thank you.