[1] Firefox Focus: プライバシー保護ブラウザー - Google Play の Android アプリ ( (2017-06-21 11:34:33 +09:00)) https://play.google.com/store/apps/details?id=org.mozilla.focus

[2] Introducing Firefox Focus - A Free, Fast Private Browser for iPhone - The Mozilla Blog ( (2017-06-21 11:35:04 +09:00)) https://blog.mozilla.org/blog/2016/11/17/introducing-firefox-focus-a-free-fast-and-easy-to-use-private-browser-for-ios/

[3] 追跡広告をブロックするブラウザ「Firefox Focus」、Android版が登場 - CNET Japan ( (2017-06-21 11:35:09 +09:00)) https://japan.cnet.com/article/35103037/

[4] Firefox Focus for Android Hits One Million Downloads! Today We’re Launching Three New User-Requested Features - The Mozilla Blog (2017-07-20 22:10:40 +09:00) https://blog.mozilla.org/blog/2017/07/20/firefox-focus-android-hits-one-million-downloads-today-launching-three-new-user-requested-features/