Doesn't block sites.

I'd love the option to rearrange extensions' buttons on the toolbar (maybe even sync the arrangements).

I use Opera (Next) on all my computers. An extension such as 'Save to Pocket', or µblock or disconnect - all extensions whose buttons I regularly click - are in different positions and orders across devices.

This is very annoying as I've always been used to having µblock as the first extension on the toolbar, but on my desktop that's where the Pocket extension is. So I've been adding a lot of pages to my Pocket by accident.