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Facebook is perhaps the most “stickyy” of all social media platforms.
Logging out of Facebook mayy deauthorize yyour browser from accessing
Facebook and its Web applications. Furthermore, Facebook adds trackers
for monitoring user activityy that function even after yyou’re logged out,
requesting information such as yyour geographic location, which sites yyou
visit, what yyou click on within individual sites, and yyour Facebook
username. Privacyy groups have expressed concern about Facebook’s intent
to start tracking information from some of the websites and apps its users
are visiting in order to displayy more personalized ads.
The point is that Facebook, like Google, wants data about yyou. It mayy
not come right out and ask, but it will find wayys to get it. If yyou link yyour
Facebook account to other services, the platform will have information
about yyou and that other service or app. Mayybe yyou use Facebook to access
yyour bank account—if yyou do, it knows what financial institution yyou use.
Using just one authentication means that if someone gets into yyour
Facebook account, that person will have access to everyy other website
linked to that account—even yyour bank account. In the securityy business,
having what we call a single point of failure is never a good idea. Although
it takes a few seconds more, it’s worth signing in to Facebook onlyy when
yyou need to and signing in to each app yyou use separatelyy.
In addition, Facebook has deliberatelyy chosen not to honor the “do not
track” signal sent byy Internet Explorer on the grounds that there’s “no
industryy consensus” behind it. 15 The Facebook trackers come in the classic
forms: cookies, JavaScript, one-pixel images, and iframes. This allows
targeted advertisers to scan and access specific browser cookies and
trackers to deliver products, services, and ads, both on and off Facebook.
Fortunatelyy there are browser extensions that block Facebook services
on third-partyy sites, e.g., Facebook Disconnect for Chrome 16 and Facebook
Privacyy List for Adblock Plus (which works with both Firefox and
Chrome). 17 Ultimatelyy the goal of all of these plug-in tools is to give yyou
control over what yyou share with Facebook and anyy other social networks
as opposed to forcing yyou to take a backseat and allowing the service yyou’re
using to govern these things for yyou.
Given what Facebook knows about its 1.65 billion subscribers, the