Vivaldi 8.3 rebuilds ad blocker with four protection levels and custom filter profiles

Vivaldi has released version 8.3 of its Chromium-based browser with a redesigned Ad and Tracker Blocker engineered to process large filter lists more efficiently. The new system offers four protection presets—Off, Light, Strong, and Aggressive—plus the ability to create custom blocking profiles using remote or local filter lists. Users can set global defaults and override them per-site via the address bar shield icon, with preferences persisted across sessions.

Beyond privacy features, Vivaldi 8.3 adds an expandable vertical tab bar that reveals full titles on hover while keeping favicons visible when collapsed, a compact grid layout for pinned tabs, multi-URL paste-and-open, link sanitization to strip tracking parameters before copying, faster Reader Mode initialization, and Chrome Tab Groups API compatibility for extensions. The release is available for Linux, Windows, macOS, Android, and iOS.

Ad blocker architecture and tab management changes

• Redesigned filter engine: The rebuilt Ad and Tracker Blocker is optimized for handling large filter lists with reduced resource overhead compared to the previous implementation.
• Four protection levels: Presets range from Light (most trackers and some ads) through Strong (broader protection) to Aggressive (near-complete blocking), with trade-offs in site compatibility documented by the vendor.
• Custom blocking profiles: Users can define profiles selecting preferred filter lists and supplementing them with additional lists from remote URLs or local files, extending beyond the built-in defaults.
• Per-site policy override: Site-specific blocking levels are configurable via the shield icon in the address bar and remembered across browser sessions, enabling granular compatibility management.
• Vertical tab bar expansion: The new hover-to-expand behavior for vertical tabs shows favicons in the collapsed state and full titles on mouseover, with pinned tabs now arranged in a compact grid rather than stacked rows.

Why it matters

For Linux desktop users who rely on Vivaldi as a privacy-oriented Chromium alternative, the rebuilt blocker reduces dependence on third-party extensions for ad and tracker filtering while maintaining the browser's distinctive tab management workflow. The cross-platform availability including Android and iOS, combined with Chrome Tab Groups API support, helps extension developers target Vivaldi with fewer compatibility gaps.