07 Novembre 2025 11:41:16
Notizie: lo sai che puoi installare Firefox anche su dispositivi Apple iPhone e iPad? Provalo subito!
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general.useragent.extra.firefox
...magari dovrebbero cominciare a pensare che potrebbe essere il caso di vagliare l'ipotesi di aggiungere FF4 alla lista dei browser
Please DO NOT use this (N.d.R. browser sniffing) in place of feature detection. Though many browsers have known JavaScript implementation quirks, it is bad practice and unsafe coding to make the assumption that because the page is being viewed in browser X that you can rely on feature Y being available. Check for feature Y if you need it.Browser sniffing is an imprecise science, and relies on many things in the browser environment to be just right. Though many techniques are very accurate, 100% accuracy can't be guaranteed.
Jason Titus, head of engineering at Yahoo Mail, defends the use of browser detection in Yahoo's new e-mail user interface, which uses both whitelists and blacklists. As he sees it, browsers c :roll:an be buggy, they don't fully implement the standards, they often interpret standards differently and some are crash-prone."Very complicated pages like Yahoo Mail require a high level of performance and stability that simpler pages do not," he says. Yahoo Mail uses whitelists and blacklists "to protect our very large user base from potentially harmful bugs or issues." Yahoo Mail supports the browsers that the internal development teams use most often, including IE, Firefox and Safari. Other browsers -- and new versions of white-listed browsers -- are not added until they pass Yahoo's quality assurance certification. And that, Titus acknowledges, is a time-consuming process that can take weeks.But Yahoo Mail's detection scheme isn't perfect. It blocked this reporter's Firefox 3 browser -- which was supposed to be white-listed -- from accessing Yahoo Mail, and it let in Opera, which isn't on the approved list. Meyer says browser-sniffing techniques are simply too fragile. "Who cares what the browser is called? I could rename the user agent string to 'my cool browser.'