Windows Size issue on KDE with default taskbar/window frame sizes
I ran the Tor Browser bundle on Debian stretch/stable (installed via the Debian repostories). As DE, I am using KDE (plasma 5.8.6), with default taskbar/window frame sizes. My screens resolution is 1680x1050. I started using the Tor Browser with version 8.0 on this machine, and the issue has existed since.
Expected behaviour: When opening the Thor browser, the windows height automatically adjusts to a multiple of 100 (<=1000) and a width of 1000.
Actual behaviour: The windows opens in a size of 1000x895.
It seems that monitor height minus the Tor Browser Window title bar, the tab bar, the address bar and the KDE panel is 895 pixel. Somehow the Tor Browser thinks it can reach 900 (which it cannot) and therefore, a size of 895 is reached, instead of the correct 800.
Therefore the whole concept of default windows sizes against browser fingerprinting is circumvented.
The window's size was determinded by www.panoticlick.eff.org, which was used to check how effective the Tor browser is against fingerprinting.