Cutting organizational expenses might be good for unrelated reasons, but I don't see how that increases the market share of Firefox, and I can think of a few ways it could decrease their market share.
My goal, if I were CEO, would be to reduce organizational expenses (and increase other forms of revenue) to the point where the 100s of millions of dollars from Google ($562 million in 2017) was not required for covering the cost of firefox development and spend all those millions on advertising firefox until Google stopped giving it. I can't see where having such a large part of your finances coming from your biggest direct competitor could ever be a good thing, but at least spending it on increasing firefox's market share directly through advertising would have a certain irony associated with it. At least of the Alanis Morisette variety.
What he said was: get rid of the people who are not interested in making the Firefox browser better. Get rid of the distractions. Focus on the browser.
If the goal is to plow all available resources into Firefox, then cutting down on expenses that don't directly or indirectly support the existence of Firefox seems key.
