Small tools that do one job.

Three extensions for Chrome. Each does a single thing well, in the browser you already have open. Nothing they read about you leaves your computer: the only request any of them can make is a licence check, and the build refuses to package if a network call appears anywhere else.

Channel Blocklist Free Block a channel once and stop seeing it — feed, search, sidebar and comments. Works with YouTube.
Search Browser History $4.99 one-time Keeps every page you visit, past the 90 days Chrome throws away, and searches the words that were inside them.
Chat History Search $6.99 one-time Your AI chat sidebar is a list of dates. This makes it searchable by any word in any past conversation.

How they are built

One job each

No suites, no dashboards, no account. Install it, use it, forget it is there.

Local by construction

In each of the three, the packaging script refuses to build if fetch, XMLHttpRequest, sendBeacon, WebSocket or EventSource appears in a file that handles your data. Enforced by the build, not promised in a sentence.

Buy once

Where there is a paid feature it is a single payment and a licence key you paste in. No subscription, no login, no email address required.