BUG: 418526
The profile group with the value `Default=1` is not always the default profile, for example: in the profiles.ini file from the bug report:
```
[Profile1]
Name=default
IsRelative=1
Path=dun5pnnn.default
Default=1
[Profile0]
Name=default-default
{F8192502}IsRelative=1
In the screenshot you can see that the profile with `Path=vwc2yphi.Path=xewbk2mp.default-default` has the value `Default=1`,
[Install11457493C5A56847]
but in the about:profiles page in Firefox it is not marked as the Default=xewbk2mp.default-default profile.
The correct default profile is in the `[Install4F96D1932A9F858E]` group with the key `Default`.Locked=1```
This patch originated from D28196In the text you can see that the profile with `dun5pnnn.default` has the value `Default=1`,
but it is not the default profile.
The correct default profile is in the `[Install11457493C5A56847]` group with the key `Default`.