Nice, but it disables DTrejo's keyboard navigation extension. Can you please add J-walking?

Help from the DTrejo's extension:

    Current style of hotkeys: gmail style.

    Key — Action
    j — move down
    k — move up
    o — open / view comments
    enter — same as above
    r — reply to comment or post. Only works on article pages
    w — upvote (win)
    s — downvote
    Sample Workflow
    Hit news.ycombinator.com
    hit 'j' a few times to get to the 3rd post
    hit 'o' or 'enter' to view the comments
    hit 'o' again to read the article
    hit ctrl-w or cmd-w to close the tab
    hit 'j' to scroll down the rest of the comments
    hit 'r' to respond to someone who is wrong on the internet.