This still affects Ubuntu MATE 15.10 release candidate.
How to reproduce:
* Use MATE Tweak to change the Window Manager to Compiz.
* Open Firefox with common content as it was the last time (history is on to remember previous opened tabs).
* Minimize Firfox Window
* Use CRTL + ALT + t to open a terminal
* Execute 'firefox http://www.ubuntu.com'
* Firefox will will restore but will not be missing window decorations.
This still affects Ubuntu MATE 15.10 release candidate.
How to reproduce:
* Use MATE Tweak to change the Window Manager to Compiz. www.ubuntu. com'
* Open Firefox with common content as it was the last time (history is on to remember previous opened tabs).
* Minimize Firfox Window
* Use CRTL + ALT + t to open a terminal
* Execute 'firefox http://
* Firefox will will restore but will not be missing window decorations.
Also described here:
* https:/ /ubuntu- mate.community/ t/discovered- a-correlate- with-the- windows- decoration- bug-in- compiz/ 1792