firefox 取消可以停掉javascript的選項

官方的說法是，因為許多人都不知道關掉javascript會影響許多網站的功能，因而怪罪於firefox的性能，在最新的version 23，終於將javascript的開關給取消了。但是有許多的惡意網站會使用javascript來進行攻擊，因此需要使用外掛來提供關掉javascript的功能。

目前官方的建議是使用NoScript。

Finally, Firefox 23 removes the option to disable JavaScript from the Options pane — and if you had JavaScript turned off, it has been turned back on. This contentious change derives from the fact that disabling JavaScript breaks many websites — and some people might turn off JavaScript without actually knowing  what it does, resulting in unpredictable and frustrating behavior that the user might blame on Firefox. JavaScript can still be disabled via about:config or with add-ons (such as NoScript).