oh, I thought it was a PS5 homebrew (running on the console).
So, it's a PC app.
by "generator" I thought it used mathematical computing to generate the URL's hash based on the FW version number, but it's just a list of previous URL put together. https://github.com/halolck/Ps5UpdatorGenerator/blob/main/Data
Well, it's nice that someone kept track of all previous URLs.
Though, it's the "update" URL, it would be nice to also have the option for restore URL.
I kept only 2 if you want them: