How to change line spacing in outgoing email permanently
I have read some posts like this one: https://support.mozilla.org/sl/questions/1121180
but my double line spacing (paragraph style) cannot be changed to single line spacing (text style) PERMANENTLY.
When I use: 'Tools' > 'Options' > 'Composition' > 'General' tab and uncheck "use paragraph as default style ....."
then I get the normal text style but it only works only until I restart Thunderbirs. And I have to restart it several times per day on that computer. When Thunderbirs is restarted the check is again on.
Is it possible that there is some bug since I do not use english version of Thunferbird?
Thank you for the solution!