Previously for years been using FireFox to read usenet, and when I read a post it greys out ... unless I mark it as unread.
Now when I read post they still show as unread ..... is there a setting of hotkey combination I have enabled (or disabled)
Do you mean Firefox (i.e. the web browser?) If so which web site are you using to read the group?
Tools -> settings -> general -> scroll down to "Reading and Display"
If the "automatically mark the messages as read" is un-ticked the colour doesn't change when you open a message. When ticked on my Thuderbird it changes from red to grey.
No luck with that .... its set to Automatically mark messages as read
Un-ticking certainly seems to work for me. In Version 52.9.0 it's in Tools > Options > Advanced > Reading. In Version 102.4.1 (just to confuse you) as stated above it's in Tools > Settings > General, then way down in Reading and Display.
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