I would recommend that you block 3rd party cookies, they are cookies which aren't directly from the site you are visiting. I don't have use 2nd level domain names enabled.
Hint: For your screenshots, don't capture the whole screen, just the active window or enough to display the relevant information. This keeps the file size down and opens the image when clicked within the opst not in a new window. To capture the active window - when the window that you want to capture is the active one, press the Alt key plus the Prt Scr (print screen) key together. That captures the active window (not the whole screen) and copies it into the clipboard.