See screenshot. The message states "The following add-ons have not been verified for use in Firefox." But no addons are listed or displayed on the page which is confusing.
Issue 1: It's confusing to have the text state "the following add-ons", but then not list any add-ons.
Clicking on "Show legacy extensions" from the "Missing something?" paragraph does take me to a list of addons that have been deactivated and these are labeled as "Legacy Extensions".
The legacy extensions page shows "Legacy Extensions/These extensions do not meet current Firefox standards so they have been deactivated" with a list of extensions include Firefox multi-account containers.
Issue 2: we are using the term legacy extensions to describe Firefox Multi-Account containers which is inconsistent.
Issue 3: the layout of the Unsupported extensions page has the theme image obscuring the error/warning message. See second screenshot.