No, they strongly disliked Brendan Eich to be a CEO of Mozilla. Their dislike is with the CEO, not the company. But because of the strong dislike, they cannot support the company.

Boycotting a company because of not wanting the CEO is not an attack on the company. It is expressing that you really don't like / disagree / hate / whatever the company.

I strongly dislike Brendan Eich was made a CEO. I don't want to support Mozilla in any way and I would've been very critical about Mozilla. Knowing that he supported prop 8 and then knowingly making him a CEO is not the company / organization I supported (fyi: I've triaged 600+ bugs, used to be a Bugzilla developer, have git.mozilla.org commit access, etc).