I am assuming you mean different browser. Safari and Chrome the menu shows the list of styles without any formatting. However Firefox applies the style associated with each menu item to the menu item itself. In case you are interested to have same option without style applied overlay StylesPlugin.js and custmize has per need.
Thanks Sham for the information.
Actully, with environment I mean to say the different servers like development , then production, etc. even local is also an environment.
Could u plz suggest me the steps to use this "StylesPlugin.js" Plugin.
Thanks for clarifying on environment. The StylesPlugin.js is not an option for your use case. Forgrt about it.
It will be consistent across all environment. If not file a daycare & get official help.