Does your website look fine from the user end?
Web browsers are software that interpret and display web pages, sounds and videos which are retrieved from Web servers.
The thing that we have to be aware of is, that different Browser on different operating systems could interpret your website in a different way, therefore your webpage could look perfect on a platform with one type and version of browser, but it could look ugly with another.
20 years ago, when the internet just entered into ordinary people’s life, there were a few types of browsers run on a few types and versions of computer operation systems, you could easily test your website with all combinations of browsers and platforms. It became even easier when Virtual machine was introduced.
But nowadays, there are so many different types of browsers: Chrome, Firefox, MSIE, Opera, Safari, Navigator, Dillo, Epiphany, Kazehakase, Konqueror,SeaMonkey, Flock, Links, Luakit, Lynx, Midori, Arora, Lunascape, Maxthon, Yandex, Rekonq, Iceape, Iceweasel…
And your website users could access your website with iphone, iPad, Android, Mac, Windows 7, Windows 98, Windows XP, Windows Vista…
It ends up, there are thousands combinations of browsers and platforms.
Exhaustive testing is impossible for sure.
My approach is:
First, find out what browsers and platforms your website users use to access your website. Then focus on these browsers and platforms to test your website’s appearance and functionalities.