there is a question that I -1'd because of not putting enough info ,if I want to follow that post to be notified of new answer,comments,or edits.
How can I follow that question/post?
if that feature isn't available then I request to add it to the site(s)
If you "Favorite" a question you will get notifications of updates.
That's the "star" icon under the voting buttons.
See also: How do favorite questions work?
There is a "question feed", which is a RSS (?) for a question. You can find the feeds url in the bottom right corner of every question page. Or just search on the question for "question feed".
Firefox has the "live bookmarks" feature to monitor RSS feeds, alternatively you could use Google Reader to reader RSS/Atom feeds in the could.
