I attempted to use these two for the scroll tabs function and they both failed to work.
https://addons.opera.com/en-gb/extensions/details/moregestures/?display=en

https://addons.opera.com/en-gb/extensions/details/opera-12-like-tab-switcher/?display=en

Am I doing something wrong?

Hello,
I have recently switched over from Chrome to Opera and have thus far been very impressed, it works way better than Chrome and I can't imagine switching back. I see a lot of people upset about changes Opera seem to have implemented, as a new user I suppose it doesn't affect me much but I really like how Opera is currently.
Anyway, my issue being that all mouse gestures work for me except Right Click + Scroll to switch between tabs and no matter what I do it still doesn't work, so I'm starting to wonder if it's an Opera issue.

On a side note, aside from Google Keep anyone know any cool Sidebar plugins?