I put items in a cart on a website that I accessed through firefox. I did not sign into any accounts on the website and I did not purchase the items. I then cleared my cookies, cache, and offline data. Later on I went back to the website and wanted to put items back in the cart to re-price everything and discovered that the items were still in the cart from before. I cleared cookies, etc. again and the items were still in the cart. I then went to the website on Chrome and the items were still in the cart. Again, I did not sign into any accounts or anything. I never use Chrome. Just went straight to the website on Chrome and went to the cart and the items were there even though I didn't use Chrome to put anything in the cart. I then cleared cookies, etc. on Chrome and the items were still in the cart. I tried this on Edge and same thing. I have used Bitdefender, Malwarebytes, Hitman Pro, and CC Cleaner and no program is finding the malware or spyware or trojan or whatever this is. This is a well-known website that even has a facebook page. I messaged the webmaster and I posted on their facebook page and I'm being ignored. What is this and how do I get rid of it?