Privacy mode or Private Browsing


Privacy mode or “private browsing“, sometimes informally referred to as “porn mode“, is a term that refers to privacy features in some web browsers. Historically speaking, web browsers store information such as browsing history, images, videos and text within cache. In contrast, privacy mode can be enabled so that the browser does not store this information for selected browsing sessions. This allows a person to browse the Web without storing local data that could be retrieved at a later date. Privacy mode will also disable the storage of data in cookies and Flash cookies. It is of note that this offers virtually no privacy protection beyond the local level. For example, it is still possible to identify frequented websites by associating the IP address with the user on the server end.

History

The earliest reference to the term was in May 2005 and used to discuss the privacy features in the Safari browser bundled with Mac OS X Tiger.The feature has since been adopted in other browsers, and led to popularisation of the term in 2008 by mainstream news outlets and computing websites when discussing beta versions of Internet Explorer 8. However, privacy modes operate as shields because browsers typically do not remove all data from the cache after the session. Plugins, like Silverlight, are able to set cookies that will not be removed after the session. Internet Explorer 8 also contains a feature calledInPrivate Subscriptions, an RSS web feed with sites approved for use with InPrivate browsing.
The common web browser plugin Adobe Flash Player began supporting privacy mode in Chrome, Firefox, Internet Explorer, and Safari with the release of version 10.1 in June 2010.
Privacy mode is known by different names in different browsers:below is shown as date of release , browser version from support this feature , and term to call this feature ! 
Date Browser Synonym
April 29, 2005 Safari 2.0 Private Browsing
December 11, 2008 Google Chrome 1.0 Incognito
March 19, 2009 Internet Explorer 8 InPrivate Browsing
June 30, 2009 Mozilla Firefox 3.5 Private Browsing
March 2, 2010 Opera 10.50 Private Tab / Private Window

Safari

Whats New

The new advanced features in Safari make it an even better place to explore the web. Safari searches even smarter so you’ll find web pages faster. It shows you all your open tabs in a great new way. Straight from Safari, you can tweet web pages, post them to Facebook, or share them via Mail or Messages. And with even more features, browsing is just the beginning.

privacy 

Safari takes your privacy seriously. You can turn on Do Not Track, an emerging privacy standard. Ticking this Privacy pane preference sends websites you visit a request not to track you online. Safari also sends a request to websites not to track you when you use Private Browsing.

Method

Turn on Private Browsing

  1. While browsing a webpage using Safari, choose Safari > Private Browsing.
  2. When you see a confirmation message, click OK. A Private button appears in the address field to indicate that private browsing is on.
    To skip the confirmation message, hold down the Option key while you choose Private Browsing.
Private Browsing is always turned off when you open Safari, even if it was on when you last quit Safari.

Turn off Private Browsing

  1. While browsing a webpage using Safari, choose Safari > Private Browsing (so the checkmark disappears), or click the Private button in the address field.
  2. Close any Safari windows you used to view private information. If you don’t close the windows, other users can view those pages using the Back and Forward buttons.
  3. If you downloaded any items from websites, Private Browsing only removes the names of the items you downloaded from the Downloads window. To get rid of the items themselves, delete them from your computer.

If you forget to turn on Private Browsing

After you finish browsing, choose Safari > Reset Safari.

Google Chrome  ,                                       TorchBrowsers ,                                  Chromium 

Incognito mode (browse in private)

For times when you want to browse in stealth mode, Google Chrome,torch,chromium browser offers the incognito browsing mode. Here’s how the incognito mode works:
  • Webpages that you open and files downloaded while you are incognito aren’t recorded in your browsing and download histories.
  • All new cookies are deleted after you close all incognito windows that you’ve opened.
  • Changes made to your Google Chrome(Torch,chromium) bookmarks and general settings while in incognito mode are always saved.
Tip: If you’re using a Chromebook, you can use the guest browsing feature as an alternative to incognito mode. When browsing as a guest, you can browse the web and download files as normal. Once you exit your guest session, all of your browsing information from the session is completely erased.

Open an incognito window

  1. Click the Chrome menu on the browser toolbar.
  2. Select New incognito window.
  3. A new window will open with the incognito icon in the corner. You can continue browsing as normal in the other window.
You can also use the keyboard shortcuts Ctrl+Shift+N (Windows, Linux, and Chrome OS) and ⌘-Shift-N (Mac) to open an incognito window.
Windows 8 users: To switch between windows, click the window switcheron the top right corner.

On Chrome for iOS, due to platform limitation regular and incognito* tabs share HTML5 local storage, which is typically used by sites to store files on your device (client-side caching) or to provide offline functionality. This means the same sites can always access their data in this storage in both regular and incognito* tabs. Incognito* tabs will still keep browsing history and cookies separate from regular tabs, which are cleared once those tabs are closed

Internet Explorer 

InPrivate Browsing helps prevent your browsing history, temporary Internet files, form data, cookies, and user names and passwords from being retained by the browser. You can start InPrivate Browsing from the Safety menu, by pressing Ctrl+Shift+P, or from the New Tab page. Internet Explorer will launch a new browser session that won’t keep any information about webpages you visit or searches you perform. Closing the browser window will end your InPrivate Browsing session.

Mozilla Firefox 

What does Private Browsing not save?

  • Visited pages: No pages will be added to the list of sites in the History menu, the Library window’s history list, or the Awesome Bar address list.
  • Form and Search Bar entries: Nothing you enter into text boxes on web pages or theSearch bar will be saved for Form autocomplete.
  • Passwords: No new passwords will be saved.
  • Download List entries: No files you download will be listed in the Downloads Windowafter you turn off Private Browsing.
  • CookiesCookies store information about websites you visit such as site preferences, login status, and data used by plugins like Adobe Flash. Cookies can also be used by third parties to track you across websites. For more info about tracking, see How do I turn on the Do-not-track feature?
  • Cached Web Content and Offline Web Content and User Data: No temporary Internet files (cached files) or files that websites save for offline use will be saved.
Note:

  • If you create new Bookmarks while using Private Browsing, they will not be removed when you stop Private Browsing.
  • If you save files to your computer while using Private Browsing, they will not be deleted when you stop Private Browsing. However, any files you open in an external application will be cleared from the system’s temporary folder, and none of the files you download will appear in the Downloads list.

How do I open a new Private Window?

There are two ways to open a new Private Window.

Open a new, blank Private Window

  • On the menu bar, click the File menu and select New Private Window. A new Private Window will open.

Open a link in a new Private Window

  • Hold down the Ctrl key while you click on any link and choose Open Link in New Private Window from the context menu. A new Private Window will open with the link you selected.
Important: When in Private Browsing mode, the window title will say (Private Browsing) followed by a purple Private Browsing mask. You may also have other windows open that are not Private Browsing windows.

How do I always start Firefox in Private Browsing?

There is a setting in the Preferences window that automatically enables Private Browsing whenever you start Firefox.
Note: If you enter Private Browsing this way, the Firefox title bar won’t say (Private Browsing) and won’t have a purple Private Browsing mask but Firefox will still not retain your history as described above.
  1. On the menu bar, click on the Firefox menu and select Preferences…
  2. Select the Privacy panel.
  3. Set Firefox will: to Never remember history.
  4. You will see a message that Firefox needs to restart to enable this feature. Click OKand Firefox will restart in permanent Private Browsing mode.

Opera 

Create a private tab

To create a private tab, select Tabs and Windows > New Private Tab from the menu. Alternatively, right-click the tab bar and select “New Private Tab” from the context menu.

Close a private tab

Close a private tab in the same way as a normal tab. To close all the private tabs you have open at once, right-click a tab and select “Close All Private Tabs” or use the Ctrl+Shift+Q keyboard shortcut.

Private windows

If you prefer to use separate windows when browsing, rather than tabs, you can create a private window by selecting Tabs and Windows > New Private Window. Closing the window removes all traces of your browsing.
*A closed private tab or window cannot be recovered from the “Closed Tabs” drop-down on the right side of the tab bar.
While private tabs or windows do not leave any record of the websites you visit, if you deliberately save data, for example, if you save a bookmark, or download a file, it will still be visible after the tab is closed.

Delete private data

If you are not using the private browsing functionality, you can still protect your privacy by configuring Opera to clear the history and cache or other type of private data when you close the browser. To do this, go to Opera > Preferences…. Click the ‘Privacy & security’ tab on the left sidebar. Under ‘Privacy’ click the Clear Browsing Data… button. From the dialog, you can check-select what you would like to delete (browsing history, download history, cookies, cache, or passwords) and how far back in time you would like to do so.

Disable or clear data from the password manager

If you use the password manager to save your passwords, you may want to disable it when sharing a computer or using a public one. Go to Opera > Preferences…. Click the ‘Privacy & security’ tab on the left sidebar. Under ‘Passwords’ untick the Offer to save passwords I enter on the web checkbox.
If you use the password manager to save your personal data for auto-completion in online forms, you can clear this information by clicking the Manage saved passwords button. From the dialog, you can search for passwords and tell Opera to forget information by hovering over an entry and click the ‘X’ that appears to the right.

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