I just wanted to record my thanks for doing this project Bert. Sadly I don't have time to help testing but when it's fully operational I will inevitably use your client rather than Wine or switch into Windows (I multi-boot Win 7 and 10 as well as several Linuxes). So you have my gratitude, and if I do find something worth reporting back I surely will post here (seems more appropriate than the grc newsgroup).
I mainly use Linux Mint 17.3 with the Mate desktop which has been very stable. Occasionally I use Mint 18.3 but still prefer 17.3. I'm hoping 19 will be better. Tending to use Chrome for general stuff more than Firefox but I have 4 different Firefox profiles for various levels of lock down / privacy. Use Lastpass and will be crossing fingers to migrate many sites to sqrl in the not too distant future.
I mainly use Linux Mint 17.3 with the Mate desktop which has been very stable. Occasionally I use Mint 18.3 but still prefer 17.3. I'm hoping 19 will be better. Tending to use Chrome for general stuff more than Firefox but I have 4 different Firefox profiles for various levels of lock down / privacy. Use Lastpass and will be crossing fingers to migrate many sites to sqrl in the not too distant future.