''jisan [[#question-1195236|said]]'' <blockquote> a script in the extension is causing firefox slow down when i browse facebook' i want to avoid this type of message permanently.... </blockquote> How are we to help you do that when you have provided no information at all to even start from. What Extension ? You have Send info to Mozilla turned off With in Firefox so there is no info here to even begin helping you with a description as vague as what you have supplied.