I can read. The point is that the number doesn't translate: 7.5 million lost users over 2023 doesn't correspond to a 0.75% decline in global browser presence. 7.5 million is a tiny fraction of that.
It does if the global number of active browsers increased. The more people get connected to the internet, and the more of them use Chrome or Edge, the smaller Firefox' market share will be if their user numbers stay about equal.
7.5M out of 193M is 0.39%, so it's off by about a half. Hardly a "tiny fraction". Presumably the growth in internet users in the period would increase the relative decline in market share, too.
You're comparing apples to oranges. The 0.75% decline from the OP is of market share across all browsers. The figure here is a 3.9% (not 0.39%) decline in Firefox users only. This would translate to 3.9% of 3.79% = about 0.14% of market share. It's not about half but more than 5x less.