I'm happy to announce that I managed to create a few browser and game addons for LE13.
The 64bit ARM versions (aarch64, eg for RPi4 and RPi5) have just been uploaded to the LibreELEC addon repo, you'll now find them in the "Progams" section. Generic/x86_64 will follow at a later point.
Under the hood these addons use the flatpak versions in a minimal wayland session with kodi stopped.
You can configure the display resolution for these addons in the new "Exteral programs helper" addon - I recommend using 1920x1080 if you are a couple of meters away from your 4k TV, otherwise the browser GUI will be really tiny.
In the new "Flatpak" addon you see a list of all installed flatpaks and can update them via the context menu ("Check for updates").
The new "Terminal (Foot)" addon is also available for 32bit ARM from our repo, this is a native program, not a flatpak. You can configure the font size via it's settings.
Note: browsers have become real monsters today, you need at least 2GB of RAM to run them and you also need several GBs of space on your /storage partition (I recommend at least 8GB).
Also note that retroarch currently doesn't the cores buildbot URL configured by default on aarch64, you need to manually configure it to http://buildbot.libretro.com/nightly/linux/aarch64/latest/ in the Updater settings to download cores.
And: make sure you are running the latest LE13 nightly build, compatibility with older nightlies has not been tested.
so long,
Hias