Firefox ? Chrome ? Brave ?...
It all depends on your habits, which in this case do not need to be changed. Accordingly, you do not need to specifically install any browser to install MetaMask. What you need to pay attention to is the security of the network and interaction with questionable sites, then your coins will be safe.
Many recommend Firefox and Many also recommend Chrome, I think both are good browsers for metamask,
I use both and there is no problem, but be careful when using Metamask don't use VPN if you want to be safe, just giving information