jQuery.browser was deprecated in version 1.3, and finally removed in 1.9. Browser sniffing is notoriously unreliable as means of detecting whether to implement particular features.
Where possible, use feature detection to make code decisions rather than trying to detect a specific browser. The Modernizr library provides a wide variety of feature detections. As a last resort, you can directly look at the navigator.userAgent string to detect specific strings returned by the browser.
Examples of incorrect code for this rule:
if (!$.browser.msie) {
console.log("supported!")
}Examples of correct code for this rule:
if (window.someFeature) {
console.log("supported!")
}