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Firefox for Android now supports over 450 add-ons
(www.ghacks.net)
This is a most excellent place for technology news and articles.
There is no notification bar on the screenshot so there is no real indicator for it being a mobile screenshot.
Back then when I still worked at a radio station, the technician would always have one monitor with a similar orientation.
Yes it's easier to read and display lists with this orientation. So the radio technician would have the music and jingle list open like that