Bing Is Testing Bolded HTTPS URLs in Search Snippets
TLDR
Microsoft is testing a subtle visual tweak to highlight HTTPS in Bing search result URLs by bolding the protocol portion.
Optimixed Overview
Optimixed's original report on this story.
Microsoft Bing is testing bolded HTTPS labels in its search result snippets, applying bold formatting to the HTTPS portion of displayed URLs rather than relying on lock icons or other indicators as it has in the past.