You are so unlikely to get exploited by a browser vulnerability (if you update) that it's not worth writing about. The people powerful/rich enough have or can acquire an exploit for both.
The choice of browsers is more about what features you want and whether you want a browser engine monopoly or not. Firefox has a few features I like not present in chromium and it's also not part of the monopoly so I use it.
You are so unlikely to get exploited by a browser vulnerability (if you update) that it's not worth writing about. The people powerful/rich enough have or can acquire an exploit for both.
The choice of browsers is more about what features you want and whether you want a browser engine monopoly or not. Firefox has a few features I like not present in chromium and it's also not part of the monopoly so I use it.