Many programmers believe that because certain web browsers use a certain Layout Engine they do not need to download/install/use the other web browsers that use the same layout engine. For example. Firefox and Flock use the same layout engine, called Gecko, which means they should both display a web page the same because they are both following the Gecko layout/formatting rules. So a web page’s text and images for example should be in the same position regardless if that web page is displayed with Firefox or Flock. So why download Flock for example when you can test your web page with Firefox only? The answer is because nothing ever runs that smoothly – No one follows all of the rules all of the time.
WEB BROWSER PROBLEMS
Internet Explorer 8 for example uses a different layout engine, called Trident, so it will display a web page differently to a Gecko web browser. Internet Explorer 6 does not display/support .png files in terms of transparent images (they are displayed as grey pixels instead of see-through pixels). Firefox does not display .wmv video files by default (you need to install a separate piece of software called an Add-On). Some web browsers are naturally cluttered up with Toolbars which means a web page might look perfect on a uncluttered web browser but look awful, and need scrolling, when toolbars are cluttering.
Popularity. One reason to download/install the web browser called Maxthon is because it is China based and has been downloaded more than 218 Million times (at the time of writing). If your web pages are not displaying properly in Maxthon can you afford to lose 218 Million potential, buying, visitors?
With the above said, I would strongly recommend you download and install all web browsers. That way you can see exactly how a web page is displayed in a certain web browser. And always keep each web browser up-to-date by either using its CHECK FOR UPDATES feature or by checking its website for update files. The same applies to updating your scripting languages. Check their websites regularly for update files.
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