@Lekamea There are already several threads related to this topic.
Auto-load Favicons to use as Bookmark Icons on Speed Dial Page Instead of Page Shots/
Icons for Start Page
Option to Detect Mobile Touch Icons instead of Thumbnails
Logos for Speed Dial, etc.
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@hlehyaric @jhs_61 Or, even simpler
I'm not a gamer and want that to go away
right click on game icon > untick "show game on speed dial".
I'm getting advertising pages when I launch the browse
Let us know ad links (please replace HTTPS with HxxPS)
Let us know your extensions (some could inject ads in pages)
Test with private/guest window to see if it happens there
Block notifications (chrome://settings/content/notifications)
Unregister service workers vivaldi://serviceworker-internals
If you just mean default speed dial entries you never add... just remove them and they shouldn't appear again.