There is a bunch of browser add ons to either block particular websites (i.e. leechblock, chrome nanny or various OS specific solutions) or block the comment section of a website (i.e. commentBlocker). However, what if you want to be able to read the comment section of all websites, but want to never be able to add comments yourself, on particular sites? Is there anything that will allow this? I'm particularly interested in answers that will work for both windows and mac, and will also work for google chrome, firefox, and safari (note they can be different solutions for each browser/operating system)