I'm using Opera with only a keyboard, without the mouse. Opera includes support of
to navigate over active elements (such as links,input fields,clickable images) on the page. Current element is outlined with blue box and I can activate is with "Enter" button
The comment upvote button is not active (it shows only when mouse is over the comment).
So, I request a feature: not to hide comment upvote button, just show it in gray.