https://addons.opera.com/nb/extensions/details/github-hovercard/
GitHub Hovercard utvidelse - Opera-tillegg
Neat hovercards for GitHub.
githubhovercardutvidelseoperatillegg
https://addons.opera.com/pl/extensions/details/github-hovercard/
Rozszerzenie GitHub Hovercard - Dodatki Opery
Neat hovercards for GitHub.
rozszerzeniegithubhovercarddodatkiopery
https://addons.opera.com/fr/extensions/details/github-hovercard/
Extension GitHub Hovercard - Add-ons Opera
Neat hovercards for GitHub.
add onsextensiongithubhovercardopera
https://question2answer.org/qa/47084/feature-request-usercard-or-hovercard?show=47091
Feature Request: UserCard or Hovercard - Question2Answer Q&A
I know most top themes are providing this feature but those usercards are made solely to work with those ... A demo of hover card can be see below.
feature requesthovercard