Ekaterina, can not reproduce your issue both in 44.0 and 47.0 Firefox on Ubuntu 15.10.
Are you able to reproduce this issue in 'incognito' browser mode? I guess the issue is a side-effect of some FF extensions in your browser.
Ekaterina, can not reproduce your issue both in 44.0 and 47.0 Firefox on Ubuntu 15.10.
Are you able to reproduce this issue in 'incognito' browser mode? I guess the issue is a side-effect of some FF extensions in your browser.