Facebook recently rolled out some new updates which changed the way comment text-box works. Earlier, you would get a new line on hitting the Enter key, and there was also a little comment submit button available. However, now if you wanted a new line, it is required to use the keyboard combination
Shift + Enter, while hitting only Enter would submit the comment.
If you are annoyed with this change, there’s a simple solution available in the form of a Greasemonkey script to get back the old comment submit button and its behavior.
Here’s a preview after installing the script:
This solution works on all browsers including Google Chrome, Mozilla Firefox, Opera, Internet Explorer and Safari.
FixSillyFacebook.user.js file found at the link below.