Log search/filtering interface not accessible under some browsers

[rackenthogg]

Log view interfaces are incomplete under some of web browsers.
Search window and pull-down menus are not visible at all, also Start/Stop/Restart buttons for services are missing, too:

System: Log Files:* (all submenus)
Firewall: Log Files: Plain View
Firewall: Log Files: General
Services: Unbound DNS: Log File
Services: Dnsmasq DNS & DHCP: Log File

Visible OK under Chrome-based browsers, failing to show correctly under Palemoon variants.

Example of problem shown below.

Screenshot 1: Interface under Chrome-based Iron Browser:





Screenshot 2: Interface under Palemoon-based New Moon Browser: