missing info for the stable/testing download buttons

The info, e.g. at https://freedombox.org/download/i386/, about the stable images has been improved, but the info about the testing images is missing an important information to choose between the images.

Here is a draft (with added info in bold type):

Stable

Latest of the two-year releases, gets updated with security fixes and some new (backported) features

Testing

Rolling release with all the latest features , will become the next stable release and then remain following the stable branch

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However, I don't know how the testing images behave when a new stable Debian release comes out.

Will they continue to follow the next testing, or will they stay on the new stable branch with security updates?

I could add this useful info to the description. (To me, it would seem useful, and to be on the safer side, if the images would stay on the stable branch by default, and would only allow to manually update to the next testing branch again.)