This is a common issue, because your site currently tries to load a logo image with an alt text set, but the image file is not present. The difference comes from the two browsers handling these kind of errors differently. While Firefox shows the alt text (Hearth of Inquiry) instead of the image, Chrome shows the image's supposed space, clearly showing the error with this.
I have installed the theme on one of my test sites, and I think I have a solution for you: in your WordPress dashboard, please go to Appearance->Customize, and on the left side under the Site Title and Tagline, you have an option to upload and/or choose a logo image. Under that, there should be a remove image link, please click on that. This should remove the error you get in chrome.
Please let me know if this has solved your issue.
By the way, you have a really nice site here. If you allow me some constructive critique, I would definitely put up some contact page where your readers could get in touch with you, beside the ability to write a comment. :-)
Toth Balint BT