There are a few requests already about how to deal with the duplicate tabs situation (when you happen to have the same URL opened in multiple tabs).
The general request is to somehow automatically close the duplicates, which is hard to do right because there are legitimate use cases for opening multiple tabs to the very same URL.
Opera handles this in a pretty subtle way: it just highlights all of the identical tabs whenever one of them is hovered on in the tabs bar.
This combined with TabTab Search extension allows me to avoid tab duplication very efficiently.
I’d love to see this highlight duplicate tabs feature in Brave !