Vlad Well actually, I think that I have changed my mind regarding this because sometimes I have very long pages that I absolutely do not want to close, because if I do I would have to recall from memory where in the text I was. So perhaps the real thing that should be done is instead adding a shortcut to pin tabs instead of allowing command+W just to remove your pinned tabs, as that would mean pinning tabs is merely visual. So what should be done is allowing a shortcut such as command+shift+i, which will override the shortcut for the command+i that is on this website.
If an additional shift key is pressed by the way, such as command+shift+i, it should not use the website shorcut. Website shortcuts should only take precedence if the shortcut in question is transparent. So command+shift+i should not be overrided by the italic shortcut on this website. I know that this should be a separate request, but I do not want to make too many request as I have made way too many already.