I just retested this issue in Chrome, there is the customary warning banner across top of window requiring allow or not,
if I blocked unsecure content, e-junkie script is disabled as a result. No lightbox cart. All scripts are disabled. Even in-page, self-hosted scripts.
I can get a browser cart by right clicking on product and open in new tab, but obviously this is not a solution, meant only as a detail, clue.
The real challenge here is that e-junkie is also disabled when customer chooses to block unsecure content. The cart should still function.
Searching through Chrome security options, there is nothing that seems relative.