I miss extensions support years ago, but now much more.
It's because recently I discovered an extension that makes what I wanted, get rid of all annoying cookies messages using my own settings in every website. It is 'Super Agent - automatic cookie consent' that I use in all my desktop browsers.
I would be a great feature to Opera, to have extensions support, like Kiwi browser for example.

Another reason (mine): I have a compilation of applications for Windows. In most of them I have the shorcut to homepage for each application to download new versions. Useful or not?