EDIT: Seems like they edited their comment instead of replying (kinda weird?), answering "yes" to my question. Perhaps I am a pessimist but I am doubtful that every single maintainer involved in Iceweasel complies with their requirements. And presumably this applies to more than just the browser: what OS are they using? What apps do they use? What phone do they have? What bank do they use? What car do they own? Etc. When you take such a hard stance against something over a refused pronoun PR (which btw was definitely chuddy of him), you nonetheless invite scrutiny against yourself, particularly when you say things like "You might be amoral, some of us give a fsck."
What I'm assuming is that 1attice is boycotting public statements, not actual impact. It's why JK Rowling is so hated but not Orson Scott Card: the latter is likely giving just as money money to objectionable causes but he's not being loud about it [anymore], whereas JK Rowling is being loud... very loud. And so buying Harry Potter merch becomes a litmus test for morality, but not buying Ender's Game merch. Alas.