It is an early access release that should not be used in production environments. Opera One is available as a developer preview. Related tabs, e.g., links that are opened in a tab, are opened in the same group, which improves manageability.
Tab groups can be collapsed, expanded and moved around. Tabs may be opened in groups or individually. Tab Islands is Opera Software's interpretation of Tab Groups. Opera engineers have added multithreaded compositor support to the browser to improve the smoothness of animations and transitions in the browser. Opera One is based on Chromium, which ensures good web compatibility and speed. The new browser includes the AI prompts feature that Opera Software launched in Opera Stable recently, and a new feature that Opera Software calls Tab Islands. Opera is betting on modularity and AI integration in Opera One. For now, it is available as an early access version that users and developers may test.