I am currently studying and practicing bootstrap 3 Library ,There is part of nav-pills which is particularly confusing ,many other references prefer nav-tabs rather than nav-pills why is that and can we use nav-pills for cross browser purpose ? any example much appreciated!
They're two different things. In the example you've posted a link to, you can see nav-pill is what gives the element a "highlighted" look. Whereas nav-tabs is the "tab" looking element at the top of the example.