How to disable ipfs access through browser?

I was wondering, if I’m putting my NFT images on ipfs, is it possible to access unminted NFT images through the browser ?
Let’s say someone mints the first NFT, so he can see the ipfs URL from the “view source” on opensea, he can copy that to the browser and change the extension to view the next file.
As in: “” to “”, or he can see the json file content for example and change it to the next json file.

I hope I’m being clear of what I’m referring to. I tried doing that on existing NFT projects and I could access the images by changing extension, but is there a way to lock that before the mint is sold out so people wouldn’t be able to view the art before they mint it ?

Thanks you