2 ms·Already possible: https://www.localcdn.org/ https://www.localcdn.org/by ahoka 2y agoAlready possible: https://www.localcdn.org/ https://www.localcdn.org/hanniabu 2y agoThat's an extensionwizzwizz4 2y agoThat's an implementation detail. Several parts of Firefox and Chrome are implemented internally as extensions.