Installing in Firefox and/or Chrome/Chromium failed

## Environment

* Operating system (including version): Ubuntu 22.04
* mkcert version (from `mkcert -version`): 1.4.4
* Server (where the certificate is loaded): localhost
* Client (e.g. browser, CLI tool, or script): browser (chrome/chromium)

## What you did

- installed the binaries as instructed
- `mkcert -install`

## What went wrong

```
The local CA is already installed in the system trust store! 👍
Installing in Firefox and/or Chrome/Chromium failed. Please report the issue with details about your environment at https://github.com/FiloSottile/mkcert/issues/new 👎
Note that if you never started Firefox and/or Chrome/Chromium, you need to do that at least once.
```