Shopify layout issues - only me?

I'm preparing my first Shopify store, after many years working exclusively with WP. But a weird thing that I noticed is that when I enter in any Shopify store, or even in the main Shopify website, clikcing on FB link or even through a google search, I get a layout enterally messed up (example attached).

I wonder if there is really a problem, or if it should be something from my side?

No issue here, usually a browser addon is responsible, when you experience something like this. Try disabling your adblocker (if there's any) and start from there.

Thanks. That was my initial thoughts, but considering that is happening both on Firefox and Chrome it made me think. I will try to troubleshoot deeper.

Update: I already identified the guilty browser addon on Firefox. I don't have it in Chrome, so there is a second one there creating exactly the same issue.