APEX

Hey everyone .

I have a Richtext(TinyMCE) in a page with this setting :

I also add some extra config in “Initialization JavaScript Function” to set the toolbar fixed on the header .

function(options) {
    //fixed toolbar position
   options.editorOptions.toolbar_sticky = true; 
   options.editorOptions.toolbar_sticky_offset = 100;
   return options;
}

But there's something strange happens on displaying my richtext toolbar on FireFox . As you can see it will cover another button at the top and the position of it is not correct .

and this won't happen at all in chrome browser :

Any help would be appreciated about this issue on firefox .

APEX version is : 23.1.0