By default AngularJS use jQLite which is the subset of jQuery. If you want to use jQuery then simply load the jQuery library before loading the AngularJS. By doing so, Angular will skip jQLite and will started to use jQuery library.

AngularJS is a first class JavaScript framework which allows you to build well structured, easily testable, and maintainable front-end applications. It is not a library since library provides you limited functionality or has dependencies to other libraries.
It is not a plugin or browser extension since it is based on JavaScript and compatible with both desktop and mobile browsers.

The latest version of AngularJS 1.3 support Safari, Chrome, Firefox, Opera 15+, IE9+ and mobile browsers (Android, Chrome Mobile, iOS Safari, Opera Mobile).
AngularJS 1.3 has dropped support for IE8 but AngularJS 1.2 will continue to support IE8.

The size of the compressed and minified file is < 36KB.

The features of AngularJS are listed below:
1. Modules
2. Directives
3. Templates
4. Scope
5. Expressions
6. Data Binding
7. MVC (Model, View & Controller)
8. Validations
9. Filters
10. Services
11. Routing
12. Dependency Injection
13. Testing