Edited to clarify which one I was referring to.

The definition of issue here changes significantly from person to person, from some disliking Firefox’s visual design to others criticizing business and technical decisions by Mozilla.

Honestly, there’s nothing I feel like bringing up and starting another discussion over. I mostly added that to stop certain folks from cleverly answering “but what about <issue>? Mozilla isn’t a saint!” As though that wasn’t taken into account from the start.