After years of neglect, Thunderbird still doesn't support the features of the macOS text engine, which automatically inserts the actual character you type in the correct typeface you've chosen. This is so simple to do, yet the genius engineers continue to ignore it.
There's simply no reason why when you type a ', ", or a host of other characters that it shouldn't be rendered with the proper character from the character map of the typeface you chose for composing messages. As it stands, you get, respectively, what could be an apostrophe, a foot mark, or a single right quote; or a quotation mark, or an inch mark. It all depends on the capability of the text engine in the OS you're using.
Why has Mozilla not fixed this longstanding problem long ago? When is it going to be done?
It's not that hard.
