A personal account of switching from the terminal-based trn newsreader to Thunderbird for reading Usenet news on Linux. Along the way, the author discovers how Thunderbird handles text wrapping via the `format=flowed` parameter in the `Content-Type` header. Two hidden config options in Thunderbird's Config Editor control this behavior: `mailnews.display.disable_format_flowed_support` (ignores the tag on incoming messages) and `mailnews.send_plaintext_flowed` (adds it to outgoing messages).
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