You're on v152.x meaning you don't use release channel, but some more "bleeding edge" version. These get more frequent updates as needed, to validate things.

These are the current v152 beta releases: https://whattrainisitnow.com/release/?version=beta

1. Beta 1: May 20
2. Beta 2: May 22
3. Beta 3: May 25
4. Beta 4: May 27
5. Beta 5: May 29

The Firefox 152.0 release is not until June 16.

A version on the Beta/Developers Edition channel usually has say 10 to 15 builds in testing before the Release.

The Firefox 151.0 has had two minor updates for security/stability fixes though there is a Fx 151.0.3 update planned next week.