Private Browsing – What It Is & What It Isn’t

Private Browsing – What It Is & What It Isn’t

Written by Marton Fekete / Courtesy of

All browsers provide you with a way for a so-called private browsing experience, and the descriptions are also in the same vein. Chrome named the option Incognito Mode, Firefox and Safari call it Private Browsing, while IE calls it InPrivate.

The descriptions give you the impression that if you don’t want your browsing to be recorded, you should switch to this mode and you should be safe. However, any software is only as safe as the person who’s using it.

The purpose of this article is to explain what private browsing actually helps with (you might be surprised by some of the revelations) and how you can expand the security possibilities.

Private Browsing Defined

Before I start describing what your private browser does not do, let’s quickly review what the regular browsers actually do when you’re surfing.

  • Record what websites you visited to help you find the same URLs again and recall previously visited sites
  • Manage (create, store, open) cookies to personalize your browsing experience, let you stay logged in, help you with auto-completed forms
  • Let installed extensions modify and record what shows when and how
  • Allow search engines to record your search history
  • Allow ad engines to record your browsing details and to store information on which ads you click on
  • Allow social engines to record which sites you visit while staying logged on at their site
  • Allow your internet service provider to track pages you visit
  • Allow anyone with proper (or illegal) access to your hard drive or cloud storage to find and do whatever with your files

Now, let’s take a look at what to expect from private browsing, no matter which browser you use:

  • Private browsing discards browsing history while in incognito mode, so your movement will not be recorded in your browser history.
  • Your cookies, although created, will be deleted as soon as you close a private window, so you’ll be able to utilize the possibility of those cookies only while the original window/tab is still open.
  • Some extensions/plugins will be disabled if their developer decided on that on your behalf.
  • Private browser windows have access to previously stored data like saved passwords, browsing history that are acquired though non-private browsing. The data is still accessible in private mode.

That’s about it. Now, if you compare the list to the one before about who stores data on your online activity, you’ll see that a lot of tracking points are still active.

Wait, What Tracking Points?

Just in case you didn’t know: basically every single site knows and records your actions on that particular site. What’s more, on most places you’ll have more than just one party eyeing you.

But why track me, you ask. Here are some reasons (and the parties most likely responsible):

  • Usually some kind of analytics software/plugin/engine (most often Google Analytics) want to know how much time is spent by how many people on a site
  • They want to be able to advertise their services to you even after you’d left their site (via Google AdWords and/or Facebook advertising and/or any other integrated social engines)
  • They want to be able to provide more personalized services based on your previous actions on the site, such as recommended articles or videos (so most websites that make you log in for all or certain services are ‘guilty’ of such tracking)

For a less technical but way funnier (yet sadly true) explanation, here’s a summary of your online privacy.


You should also know that your Internet Service Provider will also record your online behavior regardless of your browser settings for security and statistic purposes. I hope you’re starting to see why private browsing is not the real solution for true privacy.

So What Can You Use Private Browsing For?

1. Make your browser forget your logins

Since cookies are unrecognized in private mode, you can log in to any site, say your Facebook or an email service in private mode and you don’t have to worry that your account will stay active for others once you’re finished browsing and closed the window.

This is an excellent feature if you’re using a shared computer/terminal that is probably going to be used after you’d finished, e.g. at school or at an internet café.

For the same reason I suggest private browsing if you’re using someone else’s private computer. For one, you’re making sure the browser doesn’t remember your credentials – and also, you’re making it more convenient for the other person to get back to their account once you’ve finished.

2. Log in with multiple accounts at the same time

Most login-required services do not share Google Accounts’ possibility to handle multiple accounts at the same time – in this case, private browsing is your solution. After you’ve logged in to any of your accounts in a regular or private window, open a new private window and you’ll see that the same service asks for login credentials again. A new tab probably won’t do the trick as your cookies most probably haven’t been deleted yet.

Hint: Developers also find his feature useful when testing different user roles on a site they’re working on – this way they needn’t have any plugins or extensions just to test multiple accounts.

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