"Window Rules" plugin doesn't work in 16.04LTS

[Oleg Moiseichuk]

I'm using 16.04.1 Ubuntu (amd64) with Flashback session, fresh install.
compiz and compiz-plugins package version: 1:0.9.12.2+16.04.20160823-0ubuntu1

I need "Window Rules" plugin to place certain windows behind the others. After activation of plugin in CCSM I added rule "title=Firefox$" in "Below" field. I expected that this will put all opened Firefox windows behind the others, but nothing happened. "Regular expressions matching" plugin is activated. I tried other windows, namely "title=gedit" rule (which doesn't use regular expression) with the same result. I tried "Above" field to place the desired windows in foreground - doesn't work also.
I checked dconf settings, these strings are added to /org/compiz/profiles/Default/plugins/winrules key properly. But it seems that these rules are silently ignored.

I checked this plugin in 12.04LTS. As soon as I added "title=Firefox$" into "Below" field, Firefox window was instantly repositioned.