Firefox is just the browser, Mozilla is the organization constantly wasting money on features Firefox's users are actively hostile to in a bid to tempt away people already using Chrome. Not the OP, but I'd be down to donate to Firefox's development directly, but I wouldn't want to make a donation to Mozilla hoping it would go toward Firefox, only to find out they took my money to build some new LLM integration that nobody asked for, only to sit unused for years before being quietly shuttered in favor of the new tech buzzword of the day.