Does Opera support extensions?
Opera has incorporated some of the most useful and popular features in the browser itself, and holds itself accountable for the functionality of these features. With integrated features rather than extensions, users are not subjected to the vulnerabilities of extensions created by third parties, which may or may not go through a verification or testing process. In addition to the features that are built into the browser itself, Opera also supports some third party add-ons like plug-ins, skins, panels, custom menus and buttons, user scripts, and so on.
