On May 1st, the Mozilla Foundation released Thunderbird 2.0.0.14, the latest version of its mail/news client software.
Literal
Mozilla Foundation [topic-は] May 1 [at-に], mail/news-client-software [genitive-の] newest-version "Thunderbird 2.0.0.14" [object-を] released [polite-past-した].
Straight tech-news writing. The long pre-nominal modifier 'メール/ニュースクライアントソフトの最新版' describes what Thunderbird is. 「」 quote the product name, which appears in Latin script. The sentence is typical of IT Media press releases — crisp subject-date-object-action sequence.