Opera is one of the five downloadable extensions, which are available in each version of 4MLinux (the other ones are: CalmAV, Partition Wizard, SMPlayer, and LibreOffice). Once installed, Opera becomes a default web browser.
1) Choose Opera from the Internet Menu:
2) You must confirm the installation:
3) Now 4MLinux will download and install the newest Opera for you:
4) You must agree to the License Agreement:
Note: read this post to learn how to install Firefox with Flash Player in your 4MLinux.