In the latest version of Opera (69.0.3686.95), I can no longer reduce the addon's width all the way to the left (bring it as close to the sidebar as possible). It can only increase in size to the right.
the previous solution was to disable the flag opera://flags/#sidebar-extensions-in-browser-sidebar but there is no longer this flag.
Is there a new solution ?
I'd like to know as well, it takes up half the page, basically making this extension unusable now.