I have searched other results and read many of them but I could not get an enough information.

My question is that can a website see my MAC address or can they have an information about that I'm the same person under these conditions:

1. I am using a VPN and I use two IPs: first one is normal one, the second one is the VPN's IP.

2. I use two browsers to hide behind browser fingerprinting. I use both browsers with Incognito Mode. I always use one for normal IP, one for the VPN IP.

3. I do not know that if the website uses cookies or not. But can they collect an enough information to prove that these two identities belong to same person?

Is there any other way for them to see that I am the same person? I use different IPs, different browsers and I use both browsers in incognito mode. I even changed one of browsers language to only English. So even if they collect my info from browser, they will see two browsers using different languages.

(Addition after edit): So I have changed my IP and browser information and the website can not reach this information anymore to prove that I am the same person using two accounts. Then let's come to the title: Can they see my MAC address? Because I think that it is the last way that they can identify me and my main question is that. I wrote the information above to mention that I changed IPs and I have some precautions to avoid browser fingerprinting (btw my VPN provider already has a service about blocking it). I wrote them because I read similar advices in some related questions but my question is that can they see my MAC address (or anything else that can make me detected) despite all these precautions.

And lastly,

1. Is there an extra way to be anonymized that I can do? For example, can my system clock or anything else give an information?

Thanks in advance.