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Highlights:
All devtools bugs fixed between Firefox 34 and Firefox 35.
mask-type property has been activated by default (bug 1058519).filter property is now activated by default (bug 1057180).@font-face at-rule now supports WOFF2 fonts (bug 1064737).bottommargin, leftmargin, rightmargin and topmargin attributes of the <body> elementlet declarations has been implemented. In conformance with ES6 let semantics, the following situationslet within the same scope in function bodies is now a syntax error.let in function bodies before the declaration is reached and evaluated is now a runtime error.Symbols (only available in the Nightly channel) have been updated to conform with recent specification changes:
String(Symbol("1")) now no longer throws a TypeError; instead a string ("Symbol(1)") gets returned (bug 1058396).[[Prototype]] a single function, denoted %TypedArray% in ES6 (but otherwise not directly exposed). Each typed array prototype now inherits from %TypedArray%.prototype. (%TypedArray% and %TypedArray%.prototype inherit from Function.prototype and Object.prototype, respectively, so that typed array constructors and instances still have the properties found on those objects.) Typed array function properties now reside on %TypedArray%.prototype and work on any typed array. See TypedArray and bug 896116 for more information.__proto__:value will mutate the [[Prototype]] in the object literal syntax.__proto__() {} will not overwrite the [[Prototype]] anymore.NavigatorLanguage interface is now available to workers on WorkerNavigator (bug 925849).Element.closest method returns the closest ancestor of the current element (bug 1055533).dtls OpenType feature (via the CSS font-feature-settings on the default stylesheet) is now applied automatically to MathML elements when positioning scripts over it (e.g. dotless i with mathematical hat).No change.
No change.
_getTabForBrowser() method on the tabbrowser element has been deprecated. In its place, we've added a new, public, method called getTabForBrowser. This returns, predictably, the tab element that contains the specified browser.