There’s an issue filed for this.
Agree, though they were also fairly out of view in the old front-end. We will tackle this early next year because it’s a long-standing problem.
Don’t know if this is adequate for you, but you can use the AMO API for this. For example, this query should give you the latest extensions.
We plan to add this soon.
We have ESR for people who want to update less often. Most software, especially Internet-facing software, needs frequent updating in order to stay safe. Those versions of Firefox you’re using are vulnerable to published security bugs that could cause an attacker to compromise your system.