Reviving uMatrix Under Manifest V3's Stricter Rules

uMatrix was a beloved extension for fine-grained web permission control, but Chrome's shift to Manifest V3 made traditional blocking mechanisms impossible. This exploration shows that using Content Security Policy and the declarativeNetRequest API, it's entirely feasible to recreate uMatrix's core functionality—demonstrating that user control over third-party permissions doesn't have to be sacrificed for browser modernization.