cryptowat.ch does not work on
- Mozilla Firefox  ESR 38.5.0 [sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C%20Portable%20Ed./],
- Tor browser 5.0.7 [ archive.torproject.org/tor-package-archive/torbrowser/5.0.7/torbrowser-install-5.0.7_en-US.exe ],
- Opera 12.18 [opera-usb.com/download/operausb1218en.zip],
- last Otter browser [netcologne.dl.sourceforge.net/project/otter-browser/otter-browser-weekly208/otter-browser-win32-weekly208-xp.zip].

Can't install newer browser due to computer power.