Yes and no!
Yes, the idea of a popup, My site started with that sort of thing but I had to give it up because Edge could not cope with it.
No, if I am unable to presetn the page with its sidebar and all.
I had thought of simply opening the page in a slightly reduced format so that the visitor could always see the main page below. the, it would be intuitive to close the smaller one to carry on with the main one.