The dev tools that are built in to most browsers offer most of the features of the other extensions you suggest out-the-box.
Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink.
Hide child comments as well
Confirm
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
The dev tools that are built in to most browsers offer most of the features of the other extensions you suggest out-the-box.