CUBE

Privacy-first Chrome extension for blocking specific URLs with Manifest V3.

Browser extensionfree

CUBE is a free, privacy-first Chrome extension for blocking specific URLs, built on Chrome's modern Manifest V3 declarativeNetRequest engine. It's aimed at Chrome users who want fine-grained, DIY control over which requests get blocked rather than relying on a large, opaque filter list.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of CUBE - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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