lePoMo

Thanks for the quick reply. I got around to testing. Bascially, it works! For me it was the linux-modules. The only thing left is some polishing, by suppressing an error....

the _original_ "Tree Style Tab" that inspired TabTree (according to the description here on github) has apparently been reworked to support Firefox 57: https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/ https://github.com/piroor/treestyletab

I now did those two tests. **Both worked perfectly**, The window reopened exactly where it was closed, and at exactly the same dimensions (both to the pixel). I did more...

> Do you have other Qt programs installed on your system? If so, do they suffer from the same issues? I have **DupeGuru** installed on my system (a duplicate file...