This might be useless, but you might want to manually change the id part in the URL:

https://mirror.codeforces.com/blog/entry/{id}

Changing id to 1 will take you to the first blog ever written on CF.

This may be entirely useless for you, but nonetheless, I found it interesting.

I don't think that this is a feature (or at least I haven't been able to find one), I just use this listor a search engine if im looking for a specific topic.

You can check this tool . It does not contain all blogs from very beginning, but it contains all blogs for a few recent month.