On the subject of optimizing for the Librem 5's screen

[Caliga]

The main reason why your experiment does not work is because of scaling.
You would have to set your screen to half the phone resolution, which would be 360x720. Or convince your desktop environment to display everything at double size:

Phone Resolution

Well, @antpanlinux, he already knew about the dev kit specs… However, @Alex_Leo, yes those are also the final dimensions, as confirmed here for example. (On that page, don’t be confused by 360x720, that is a compatibility value for software developers, that is then doubled for HiDPI displays). I currently have a Galaxy S3 Neo with 1280x720, so with 1440x720 I’ll get 115,000 extra pixels. Keep in mind that the readability of a display is not only defined by the pixel count. The d…