Thanks Aleksandr, it solved the problem!

Browser: Chrome 74.0.3729 Mac OS X

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Extension: chameleon 8.15

However, in the chrome://extensions/ tab I see Chameleon 1.8.7

I already did extension update.

I have the same problem, browser is Google Chrome 74 on Mac OS. It seems that Vk makes some new efforts to prevent MP3 downloading... That's what I've got instead of music I wanted: