Trading the article, the CEO is meeting the assigned goals exceptionally well. The CEO does not give themselves the raise per se, but the board does, right?

As it turns out, moving away from Firefox is exactly Mozilla's plan.

Earlier this year, Mozilla laid out their vision for the future of their organization -- and it did not include Firefox.  The focus for the future of Mozilla -- according to Mozilla -- is primarily based around Artificial Intelligence services.

In fact, Mozilla leadership stated, quite plainly, that they intend to take Mozilla "in a different direction."

When you consider the goals of Mozilla... the decreasing Firefox marketshare is no longer much of a concern.  In fact, moving revenue away from Firefox, while investing in A.I. systems (and other subscription services) becomes the primary goal.