Cross browser testing helps ensure a website or application works properly across different browsers. It checks functionality, features, UI elements, and compatibility with latest browser versions for issues with alignment, design, JavaScript, AJAX, jQuery, or other areas. Testing can be done manually or with tools, though manual testing is time consuming and may miss defects. Tools help save time and reduce defects by automating visual testing across browsers to identify layout problems and JavaScript errors. Popular cross browser testing tools include Browserstack, CrossBrowserTesting, and Browsera, which are web-based, while Microsoft Expression Web SuperPreview is a desktop application.

1. Cross Browser testing
Cross Browser testing helps test the compatibility of Website or Web Application with
all the intended browsers. In Cross browser testing, we check if all functionalities,
features and UI elements of the application are working as intended in different
browsers. The application should be compatible with the latest browser versions and
there should be no issues related to Alignment/design, Functionality, JavaScript,
AJAX and JQuery.
CB testing can be done manually as well as with the help of variety of tools.
However, testing the site manually can be very time consuming and test engineers
can miss some defects in this process. CB testing with the help of tools can be very
helpful as it saves a lot of time and there is a rare chance of missing any defect in
Web application. Tools available in the market are mostly for finding the Visual
defects in the website. However, tools for testing the functional working of the
application across different browsers are also available and are available in web as
well as desktop versions.
TOOLS TO LOCATE VISUAL DEFECTS IN WEB APPLICATIONS
 Browserstack.com: It is web based cross browser testing tools for websites or web
Application. User can enter the URL of the website and then he can select his
desired operating system and Browser available in the tool.
 CrossBrowserTesting.com: It is a web based cross browser testing tool for testing
the Website or Web application across different Browsers on a variety of Operating
systems and Mobile devices. User can take one of the browsers as a base browser
for comparison and rendering differences of other browsers will be displayed or the
user can compare the screenshot images side by side for more effective testing.
 Browsera.com: It is a web application for testing the cross browser testing of
website or Web application. It discovers layout problems across different browsers
automatically and locates JavaScript errors from different browsers.
 Microsoft Expression Web SuperPreview: It is a desktop application for finding
the visual defects of the web application across different browsers by comparison. A
standalone version of this software supports only Internet Explorer but a complete
version supports Firefox and Safari also.

2. COMPARISON OF CB TOOLS AGAINST 8 FACTORS
Comparison
Factors
BrowserStac
k
CorssBrowserTestin
g
Browsera Microsoft
Expressio
n Web
Super
Preview
App Type This is a Web
application.
This is a Web
application.
This is a
Web
application.
This is a
desktop
application.
Manual/Automated User has to
find the errors
manually.
Differences of other
browsers are
displayed and user
can also find the errors
manually.
Automaticall
y find errors.
User has to
find the
defects
manually.
Subscription Subscription
required for its
proper usage.
Subscription required
for its proper usage.
Subscription
required for
its proper
usage also
provides free
Subscription
for its limited
usage.
License
Key is
required for
activation.
Test Results Let the user to
take the
screen shots
of the
defected
portion. User
has to prepare
test results
itself.
Locates rendering
differences OR User
can prepare the test
results itself.
User will get
a report that
provides
details on
which pages
of website
possibly
have
problems.
User has to
prepare
test results
itself.
Supported
Browsers
IE, FF,
Chrome,
Safari, Opera.
IE, FF, Chrome,
Safari, Android
Browser
IE, FF,
Safari.
IE, FF,
Safari.
Supported
Platforms
Windows,
MAC, IOS,
Android,
Opera Mobile.
Android, Black Berry,
iPad, iPhone,
Windows Phone,
MAC, Windows,
Ubuntu
Platform
specification
s not
mentioned.
Windows
Registration Requires user
account
registration for
Proper usage.
Requires user account
registration for proper
usage.
Requires
user account
registration
for proper
usage.
No
Registratio
n is
required.
Cost Measures User has to
pay for its
usage.
User has to pay for its
usage.
User has to
pay for its
usage but a
free trial
Open
source.
User can
download it

3. period is also
offered.
from
internet for
free.