If you are a Firefox user you may use a number of the many extensions available to stretch, modify, personalize, and customize the browser's capabilities.
If Google Browser Sync is one of those extensions consider teh implications on web analytics and ad tracking.
According to Google, Browser Sync "continuously synchronizes your browser settings -- including bookmarks, history, persistent cookies, and saved passwords -- across your computers. It also allows you to restore open tabs and windows across different machines and browser sessions."
In other words, no matter how many work, home, or other computers you regularly or sporadically use, if you use Firefox, have this extension installed, and are logged in, you can theoretically be counted as one single user!!
That would inform recency and frequency metrics.
By synching your cookies, log files could, however, easily parse out more accurate unique user data from visitors using the tool.
Hope that helps!
Stewart Severino
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