The extension contains a single 36-line content script that injects one CSS rule to remove the YouTube player's border-radius, triggered by a MutationObserver so it persists across YouTube's SPA navigation. There are no network requests, no data collection, no permissions beyond a content script scoped strictly to `[domain withheld], and no obfuscation of any kind. Every ML signal is fully explained by legitimate code: `js_innerhtml` is a CSS string assigned to `style.innerHTML`, `js_appendchild` is appending that style element to `document.head`, and `js_exclamation` is the `!` in the `:not([fullscreen]):not([theater])` CSS selector. The third-party score (Impact, Likelihood) and our own risk engine (0.00) both corroborate a benign verdict; the 25% malicious publisher ratio is noted but does not implicate this extension, which is structurally trivial and does exactly what its description states.