Naive and outright dangerous advice, every release fixes important security issues.
e.g. https://www.firefox.com/en-US/firefox/152.0.4/releasenotes/
Well maybe the brain damaged mozilla devs shouldn't force visual diarrhea down everybody else's throat and then users wouldn't block updates. If only Mozilla's devs could have learned from how people deal with Microsoft and Apple doing similarly asinine redesigns.