Hi @jlnxr ,
Yes Libertine works well for CLI with ARM64 existing packages but GUI apps are not meant for the mobile form factor, you won't have good results with it.
Hardware acceleration does not work for the N5 hence poor performances on video reading.
That is a known limitation.
The scaling of webapps is probably due to the original website or the lack of maintenance of said app. If your experience is based on Facebook, that is something that they do voluntarily to force the use of their dedicated iOS or android apps.