Hetare King

I’m not an expert on making browser extensions, but I doubt they’d get direct access to the audio buffer just before it gets sent to the the OS. It should be possible to do this on the OS-level though, like with (on Linux) a PulseAudio module or something.

In Japanese: 春夏冬
It means spring (haru), summer (natsu), winter (fuyu). What’s missing? Autumn. In other words, autumn (aki) is nonexistent (nai), so this is pronounced akinai, which means “not getting tired/bored of something”.