DRAGON:
https://help.vivaldi.com/desktop/privacy/cookies/Hide Cookie warnings
Since Europe’s GDPR and a few other user privacy laws don’t allow placing cookies in your browser without consent, most websites ask for your permission as the first thing after the web page is loaded. The fastest option is to just accept everything, which always serves the interests of the website not the user. The other option is to manage your preferences and disable the data usage options all at once, if you’re lucky, or one by one, if the website wants to make it especially cumbersome.
Vivaldi offers a third option by including two blocker lists in the Ad Blocker that hide annoying cookie banners and dialogs on most websites.
To enable these lists:
Go to Settings > Privacy > Tracker and Ad Blocking;
Enable Block Trackers and Ads;
Click on Manage Sources;
In Ad Blocking Sources enable “Remove cookie warnings (Easylist Cookie List)” and “Remove cookie warnings (I don’t care about cookies)”