Keyboard shortcut for switching windows not working in Yosemite
It seems not to work in full screen mode of apps. Switching to normal mode everything works fine.
I had to uncheck "Move focus to next window", then recheck it. Then it started working.
Go to system preferences/keyboard/shortcuts/keyboard and then check box to the left of "Move focus to next window' [command `]
Before I checked box, there was no keyboard shortcut to cycle between open windows or tabs on Chrome, Safari, and Firefox.
After checking box, command` cycles between open windows/tabs in all browsers