The tooltip for the Information Tool says, "The Information Tool shows more information about any word you point at with the mouse pointer."
It takes so long on my machine to do this that it appears to be broken.... 45 seconds when I hover over the word "demons".
When I hover over many footnotes, they refore to notes elsewhere. Eg. I hover over footnote 1 for Maark 3:23 in ICC Mark vol.1. It shows

There is no way from the info window to go to this reference.
Often, the window produces more information than I want. If I open the Hermeneia commentary on 1 Chronicles and go to the section on 1 Chron 22:2-5:

If I want to know what is the content of footnote 3, I get all of this and more:

When two references appear right next to each other, the preceding reference always seems to appear first. Then, it seems to show every upcoming reference. The first seems like a bug. The second is overkill for an information window.