There are many features of a browser like :-
1. It allows you to access any site at any time .
2. Some browsers also provide less data consumption option , by which you can save your most of your data.
3. A browser can work on every network e.g. 4G , 3G
4. A browser accept cookies to give you best browsing experience .
5. Some of the examples of browser are opera mini, UC browser etc
6. Also you can make HTML documents in a browser ,