This is the second layoff at Mozilla this year, the first affecting dozens of staff on the side of the organization that builds the popular Firefox browser.
The Mozilla Foundation, the non-profit arm of the Firefox browser maker Mozilla, has laid off 30% of its employees as the organization says it faces a “relentless onslaught of change.”
They're likely preparing for their funding from Google to be cut. Having a lot of money in the bank doesn't matter if your income is lower than expenses, since you'll run out of money eventually.
They get around $500 million per year from Google, so $1 billion is just two years worth of that. 86% of Mozilla's revenue comes from that Google deal.