From the Guardian’s article about a new black box component in Chrome:
First spotted by open source developers, the Chromium browser – the open source basis for Google’s Chrome – began remotely installing audio-snooping code that was capable of listening to users. It was designed to support Chrome’s new “OK, Google” hotword detection – which makes the computer respond when you talk to it – but was installed, and, some users have claimed, it is activated on computers without their permission. “Without consent, Google’s code had downloaded a black box of code that – according to itself – had turned on the microphone and was actively listening to your room,” said Rick Falkvinge, the Pirate party founder, in a blog post. “Which means that your computer had been stealth configured to send what was being said in your room to somebody else, to a private company in another country, without your consent or knowledge, an audio transmission triggered by … an unknown and unverifiable set of conditions.”
Yeah. No. Firefox just replaced Chrome for those few instances I needed a second browser.