Well two things that I found out
1 -- I have noticed some screen tearing when scrolling, for example even on these forums.
-Turning on hardware acceleration seems to have fixed it
2 -- I like my tabs and bookmark toolbar below the main address bar so had to do the following
create userchrome.css file in the following location
Code:
C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\RANDOM.default\chrome
and add the following to it
Code:
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */
#navigator-toolbox toolbar:not(#nav-bar):not(#toolbar-menubar) {-moz-box-ordinal-group:10}
#TabsToolbar {-moz-box-ordinal-group:100!important}