Firefox accessibility issue due to word-wrap and small width
Firefox merges all words into one when in a container that has word-wrap set to "break-word" and has a small width.
This means screen readers read the hidden content as "Postedon" instead of "Posted on".
Content not hidden
Posted on: 1 January 1970
Hidden content with the issue
Posted on: 1 January 1970
Hidden content fixed
Posted on: 1 January 1970
Same content with same issue but not hidden
Posted on: 1 January 1970