ISSUE: 3782 (https://github.com/angular-ui/ui-grid/issues/3782)
ISSUE: 3782 (https://github.com/angular-ui/ui-grid/issues/3782)

e can be null in Firefox. This gives the styles is null error.

Add this extra !== null check and the error is gone.

dbckr/ui-grid,Servoy/ng-grid,dbckr/ui-grid,angular-ui/ui-grid,ntmuigrid/ntmuigrid,dbckr/ui-grid,bjossi86/ui-grid,ntmuigrid/ntmuigrid,kenwilcox/ui-grid,AgDude/ng-grid,Servoy/ng-grid,AgDude/ng-grid,kamikasky/ui-grid,InteractiveIntelligence/ng-grid,dlgski/ui-grid,mportuga/ui-grid,InteractiveIntelligence/ng-grid,AgDude/ng-grid,angular-ui/ng-grid,Servoy/ng-grid,angular-ui/ui-grid,InteractiveIntelligence/ng-grid,kamikasky/ui-grid,kamikasky/ui-grid,mportuga/ui-grid,bjossi86/ui-grid,ntmuigrid/ntmuigrid,angular-ui/ng-grid,dlgski/ui-grid,angular-ui/ng-grid,angular-ui/ui-grid,dlgski/ui-grid,kenwilcox/ui-grid,kenwilcox/ui-grid,mportuga/ui-grid,bjossi86/ui-grid