We know from multiple accounts from multiple Firefox engineers that Google engineers repeatedly expressed good faith in working together with the Firefox team to get performance parity on major sites like YouTube. We also know that they repeatedly violated this good faith agreement and when confronted could only exclaim, "Oops! Our bad." [1]

This isn't new territory for Google. They did the same thing to Windows Phone, simply excluding any of their products from working on Windows Phone, even when other developers tried to step in and fill the gap. [2]

[1] https://www.zdnet.com/article/former-mozilla-exec-google-has...

[2] https://www.google.com/amp/s/techcrunch.com/2013/01/02/micro...