Offline installer for Opera GX
Web apps support for desktop browser too? - Opera forums
Opera will not install / installer will not start in Windows 10
How to install on MacOS 10.13 (High Sierra) - Opera forums
How do I find the path to Opera in Windows 10
Install Chrome Extensions - Opera forums
Opera on Fire tablet
Older Opera Versions - Opera forums
Latest versions for Windows 7 of Opera and Opera GX
Create an "app" from a website - Opera forums