too many blocked sites

How do these sites appear blocked? Can you attach a screenshot? *http://en.wikipedia.org/wiki/Screenshot *https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem *Use a compressed image type like PNG or JPG to save the screenshot *Make sure that you do not exceed the maximum size of 1 MB ---- You can check for recently installed suspicious or unknown extensions. *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes