A user reported (ebb45f95-b401-4514-9018-522bef2a59c3) that Volume Master stops Tab Muter from working. I can reproduce: once Volume Master starts adjusting audio from a page, that tab can no longer be muted with Tab Muter, even after a reload or navigation.
I assume this is because the audio somehow gets routed though Volume Master's background page in order to boost the volume, though I don't really understand the relevant APIs so that's purely a guess.