I use acrobat plugin to show pdf files in web browsers (PHP Programming in CI). Since my contents are confidential, I want to hide save buttons, print buttons and even right clicks and in all major browsers (firefox, chrome, IE, safari, opera, etc) I am new in these all, please suggest clearly.
Forget this idea, you cannot protect PDF by hiding parts of the interface. Consider what would happen if someone just uninstalled Reader - they will be asked to save the PDF instead.
What you need is DRM. This doesn't stop files being saved, copied, shared or emails, but controls who can open them.