
This is actually by design with the modern list control.
The record title link is rendered as a standard hyperlink and always opens the item in a new browser tab. That behavior isn’t configurable today. The platform treats the title click differently from row actions.
Row actions (like View details from the three‑dot menu) are handled by the modern list framework itself, which is why those do open in the same tab when you target a webpage.
So unfortunately:
Row action -> View details -> opens in same tab (expected behavior)
Clicking the record title -> always opens a new tab (not configurable)
Workarounds people typically use
Hide or de‑emphasize the title link and rely on the row action instead for navigation
Rename the row action to something obvious like “Open details” and train users to use that
If you need full control over navigation behavior, fall back to a classic list or a custom grid (PCF) where link behavior can be controlled
At the moment there’s no supported setting to force the title click to open in the same tab. If this is important for your scenario, it’s worth submitting it as feedback it’s a fairly common ask.