How can I modify auto-completion of commercial URLs?

> I don't have an Instagram account and I've never manually entered the “.com” address for this site.

> The company website I work on every day starts with “institut(...).com”.

> Every time I start typing “inst”, the navigation bar suggests I go to Instagram instead of logically suggesting my website, where I go every day. This is a relatively new phenomenon, as I didn't have this problem until January.

How can I change the commercial links that affect auto-completion in the search bar? Thanks !

Vivaldi for Windows - 7.0.3495.29 (Stable channel) (64 bits)