Wee suggestion for usability. When I used to start a topic, i'd enter a topic title, pressed Tab to shortcut to the tags field, then tabbed to the text area in the NodeBB composer (which doesn't work in Redactor), then tabbed to the submit button to hit enter to post.
When you start a new topic, you can type into the Redactor section immediately, when it should probably be the post title.
Pressing Tab once highlights the browser tab - so you'd have to hit tab dozens of times to negotiate the links on your page before getting to the topic title.
It's just a little thing, but if you've been used to using Tab as a shortcut to post without using your mouse, then it does become noticeable.
Currently it works like - type post title - tab to category drop down - tab to tags - tab to submit.
Just a wee suggestion