Incognito Mode is Chrome's version of private browsing. It can be accessed from the settings menu at the top right of the browser, or by selecting Ctrl+Shift+N.

Google Chrome won't save your browsing history, store cookies and site data, or any personal information you use to fill out forms. Websites you visit, for instance, can still be tracked by your ISP, or employer. 

Files you download remain on your hard drive and you will have to manually delete them if you want them to stay hidden.

On mobile devices, selecting 'New Incognito Window' from the top right menu (3 vertical dots) when in the Android Chrome app. You’ll be able to tell you're using it by the 'secret agent' icon and by the change in the colour of the app’s top bar to dark grey.

Microsoft's Edge and Internet Explorer both use 'InPrivate browsing'. You can access in the 'More' tab located in the top right corner of the browser, as with Chrome.

Your browsing data, such as cookies, form data, temporary files, and web history, will not be saved, as with Google Chrome, while any temporary data stored on your device is deleted after all private browsing tabs and windows are closed.

Meanwhile, any third-party toolbars you have installed will be disabled in this mode. 

For mobile devices, select the 'More' icon, which is displayed as three small dots in the top right of the window, and then select 'New InPrivate window'.

Mozilla’s private browsing feature in FireFox is called ‘Private Browsing mode’ and offers the same privacy tools as Chrome and Edge. However, FireFox offers an additional tool that other browsers don’t to make browsing even more safe, and that’s called Tracking Protection. This is said to prevent companies from tracking your browsing history across multiple sites so they can’t record your browsing habits.

There are two ways to open a new Private Window in FireFox.

1. Click the menu button, which is presented as three horizontal bars in the top right corner of the window, and then click 'New Private Window'. 

2. Open a link in a new Private Window by right-clicking on any link and choose 'Open Link in New Private Window' from the context menu.
   
   

To open 'Private Window' on a mobile device, tap or click the menu button, which is presented as three horizontal bars in the top right corner of the window, and then select New Private Window. Once in Private Browsing mode, the browser window will display a purple mask at the top.

To enable Private Browsing in Apple’s Safari browser, simply go to File > New Private Window. A window opened in Private Browsing has a dark Smart Search field with white text.

Safari's private browsing mode also removes temporary files when you close the window. Browsing history, form data, and cookies are all wiped by default.

To access on mobile devices, click the 'Pages' icon at the bottom right of the screen, then click the 'Private' button at the bottom left of the screen. As with the desktop version, the search bar will become dark grey.

The Opera browser offers more privacy than the above browsers, its Private Mode offers a VPN connection to add another layer of secrecy to your internet browsing. It does not keep your activities totally private, but it does provide additional protection.

To enable this feature, you can either go through the menu: File > New Private Window. Or, you can use keyboard shortcuts: Ctrl+Shift+N for Windows and ⌘+Shift+N for Mac.

For mobile devices, click the 'More' icon (3 vertical dots) and select 'Private mode'. The pink coloured FAB button and the secret agent icon show that you are using private mode.