Top Level Document Blocking

[pes10k]

Problem
uBlock Origin, Brave’s current competitor for the best blocking tool, allows filter list authors to block the top-level, first-party request. This is useful when a page is overall harmful, but doesn’t fit SafeBrowsing’s threat model. It’s also useful as a (not perfect, but effective) defense against phishing, bounce tracking, etc. Similar to browser UI for cert errors, uBlock Origin allows users to “click-through” to access the blocked page.

Brave currently does not have this capability. Brave should implement this capability.

Proposal
Safe-Browsing Style Interstitial

• Add capability to adblock-rust to know about top level requests (distinct from other request types) and to reason about $document and ~document narrowing cases.
• Use existing safe-browsing interstitial to create an inert (no storage, no network request, no origin) page that allows “yes I really want to see this page” click through. This could leverage existing chromium infrastructure.
• Create new interstitial page with Brave branding.
• Have options for going back, continuing, and "dont ask again"

Designs

This is a full-screen HTML page and should use our web UI.

Desktop:

Mobile:

Assets

Figma: https://www.figma.com/file/aJu3WGDztEWNZgwQTD9yx2/?node-id=0%3A1

[karenkliu]

Designs and assets added!

[antonok-edm]

@pes10k is this a duplicate of #14134? Do the designs need to be updated in the browser to match this?

[pes10k]

Yes, lets close this in favor of #14134 .