@Dorczaa Hello ! Thank you for your reply, tho the problem is that you must change it manually (unless I missunderstood something), you must click on which preset you want, it doesn't work with the Mod Randomizer extension, or somone would need to re create another randomizer that would do it for presets.
The cool thing would be that each time I open my browser it would change randomly and automatically, without me touching anything, so that each time I open Opera it's another surprise waiting for me ! 🙂