What’s up with Vivaldi keyboard shortcuts?
CMD+Alt+ (left | right) Arrow keys does not navigate the tabs from left to right or right to left, but jumps around seemingly by Tab age…
@django You can customize these #keyboard #shortcuts ⌨️ for #tab #switching (either by their order in the tab bar or by history usage) in the #Vivaldi 
Settings > Keyboard > "Tabs" section.