Help with character encoding in Firefox & Thunderbird

I’m having trouble getting certain European characters to display correctly with my set up. I’ve tried various combinations but cannot get it to work reliably.

In oS11.2 I have British English set with utf-8


In Firefox I have Preferred language set as English/United Kingdom as first choice then English (en) as second choice.

I have also set fonts in Firefox as shown below](
I also tried Western (8859-1) instead of utf-8 but it makes no difference.

Now for an example going to this page I get a whole bunch of funny characters as seen below.](

In Thunderbird I have the following font settings](

What do I need to do to be able display these characters correctly?

It’s not your fault and there’s nothing you can do about this except tell the owner of the page about the error. The †combination is commonly seen and is the result of a UTF-8 character that is wrongly rendered in a ISO8859 page without appropriate transcoding.