Strange… I usually put my index finger on scroll wheel when I need to scroll, so right button+scroll feels way more natural. Maybe this could be investigated further.
Or - yeah - add an option. But I'm telling you: I'm pretty sure that a lot of people use index finger to scroll with the wheel, not the middle one.
@encounter Thank you for this help.
Pls don't be offended, but i think i shan't pursue this. Afaik this mod does not provide the same capabilities as the wonderful Firefox TST AddOn, which IMO is pretty much the gold standard. Not least of what i need/want, is "infinite" nesting levels, like TST. This is the big weakness of Vivaldi's current tab-stacking feature, as it's only two-tier.
@durhammer Bitwarden is great. It is what I recommend for people who need to sync between devices particular apple stuff. It's much better than Keepass for that. It is weaker for working with local programs. I need to login to a number of local programs, not browser, not internet. Keepass is better for that. For linux, I recommend keepassxc as has already been mentioned.