Earlier quoted context omitted.
Both are true. Firefox is losing ground because of multiple reasons It is slower compared to Chromium ones. It is not only slower but more power hungry on mobile phones. Its sandboxing is worse than Chromium. It is less configurable for checkbox-security-applicator Microsoft IT personnel and sysadmins. Mozilla rolls out features, UX changes and removals that constantly annoy its core userbase who can actually install…
This is nice in theory, but literally never have I heard a friend saying "I tried using Firefox, but it was too slow / too power hungry / had bad sandboxing / wasn't configurable enough". Not once. What I did hear, tens of times, is "I just use X, it came preinstalled with my phone/laptop. Why should I switch?"
Chrome is not perfect but it’s significantly lighter on the battery. Safari is the lightest on Mac but the addons suck.
Memory-wise I found both to be just as bad.