I think Thunderbird, Firefox and other programs should configure firewall as well, of course without any information about that.

@Ducdanh Nguyen without a axp chip I’m pretty sure you don’t have a h313. You’re going to have research your box on your own. Sorry but I’m too busy.

What guidance are you trying to follow?

To anyone interested, I am seeking help to test the latest tm16xx changes for the (hopefully) final upstreaming submittal. You will find in-tree patches here: https://github.com/torvalds/linux/compare/master...jefflessard:linux:tm16xx, just suffix with ".patch" to get all patches in a single download. You will find out-of-tree version, device-specific dtso and latest display-service in the https://github.com/jefflessard/tm16xx-display/tree/v4-feedback branch. Thanks to all of you for you help so far!

Flashing under Linux you will have many options to do it and check some problems on partitions etc. Normally, I use the Balena Etcher and dd by console.