Earlier quoted context omitted.
How? That quote comes from the person who was fired. She explained what she did because she's proud of it: she injected some code into a web page about unions and organising telling Googlers they had a right to organise. The Google security team is frankly deeply worrying at this point, and I say that as someone who used to work there on security related topics (but consumer account security, not internal). A small n…
> "All I did was make a popup to share the labor notice Google has to share with its workers" Does not mean rewriting the content of webpages, or having "root at google.com". It's better if you'd stop such speculation. The reality is much more pedestrian than what you describe: the person that was retaliated against only wrote simple, inert, strings of plain text. That text was not injected anywhere, and there was no…
Please do explain how someone makes a message appear in your browser when you visit a particular website, without having access to a highly privileged browser extension? That can at minimum monitor the URLs you're visiting?
I honestly really hope you aren't on the Google security team, because you seem to be missing the issue here. Someone who had a high level of access was fired for violating basic trust, apparently with the collaboration of her coworkers. What other things could this person have done to advance her political goals by subverting her access for things it wasn't meant for? Outsiders can't know. All they can see is that the company doesn't have a grip on its own workforce. That is not confidence inspiring.