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Web开发者需要注意的变化

HTML

  • Mixed content blocking. Firefox will no longer load non-secure (http) resources on secure (https) pages (bug 834836).
  • The standard syntax of CSP 1.0 policies are now implemented and enforced by default.

JavaScript

 

  • The Object.defineProperty method can now be used to redefine the lengthproperty of an Array object.
  • The option to disable JavaScript, including the options to allow moving windows/replace context menu, have been removed. You may still disable JavaScript by double clicking the "javascript.enabled" option in about:config.

HTML

 

DOM

CSS

WebRTC

MathML

  • <mspace>元素开始支持负数宽度 (bug 717546).
  • The <semantics> element now determines the visible child as described in the MathML3 specification.

Changes for addon and Mozilla developers

Firefox developer tools

Addons that overlay chrome://browser/content/debugger.xul must now overlay chrome://browser/content/devtools/debugger.xul. You may add references to both these files in chrome.manifest for compatibility.

 

See also

 

 

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