Google has a history of not playing nicely with Microsoft. The company has previously posted publicly about their competitor's software vulnerabilities, and understandably, Microsoft hasn't been very happy about it. But now, the company has turned the tables on Google. Microsoft found a vulnerability within the Chrome browser, and while Google patched it in beta versions, it wasn't fixed in the public release for roughly a month.
However, Google posted the fix on GitHub instantly, before it was applied to the public release. While the fix for this issue doesn't out the vulnerability, according to Microsoft, that hasn't always been the case. Microsoft believes that a fix should be applied before they are public knowledge.