Unfortunately, Firefox‘s security on Android is .. not the best
(https://madaidans-insecurities.github.io/firefox-chromium.ht...)
(https://madaidans-insecurities.github.io/firefox-chromium.ht...)
For people who are not spies or hoarding millions worth of cryptocurrencies on their desktop PCs, they're not likely running across zero day exploits on the regular. They are however running across trackers galore and Firefox's tracking protection and anti-fingerprinting features are likely to make a larger difference in practice for all but the most targeted of individuals.
Unfortunately.