what browser is the most popular amount users?
most properly is Internet Explorer because Internet Explorer is the default browser of windows.
At least about 60% of users leak of technical skill and they are not able to install other browsers like firefox/chrome themselves.

Most of the developers hate Internet Explorer, are you the one?
Different version of Internet Explorer ARE different and hence we need to write our script, especially javascript and css very carefully.
Otherwise, one version of IE work, the other version won’t work.
Other browser like firefox, google chrome are better, even they change the version, it would not effect much.

However, users or even customers would not care about how difficult to handle such browser issue, and that’s why developers have to take care all buggy stuffs ourseleves.

Internet Explorer does not handle well on javascript, so we need to take serious care on the development, otherwise the browser will prompt
“a script on this page is causing Internet explorer to run slowly [1]” or “Timeout while Internet Explorer busy [2]“. Although these are solutions to solve the popup issue, however, the running speed isn’t solved.

solve for IE popup issue
[1] http://go.microsoft.com/?linkid=9729250
[2] download here