Hi, Arcami

Thanks for reviewing.
The only certain way to open in the sidebar is to right-click the link and choose 'Open in Sidebar'. The behavior of opening the link when you just press it depends on the setting of the link. I mean this extension cannot control it without right clicking.
However, other extensions (e.g. Always open in current tab) may help you.
If you have any additional questions, please feel free to ask or open an issue on GitHub.