Changes:
- Fixes typo in libName for policies.json (used to be zen-$version instead of zen-bin-$version for a single file)
- Remove unneeded wrapFirefox arguments (the current defaults for wrapFirefox are good for us)
In previous iterations the browser were forced to have disabled updates but this
might create an undesirable behavior in tools like 1Password as you can see here:
https://github.com/0xc000022070/zen-browser-flake/issues/48
So I'm allowing to override the browser policies. This will only work for unwrapped packages.
