伴随着 66 正式版本的发布，Mozilla Firefox 67.0 Beta 8 (Quantum) 也紧随其后来到了 Beta 目录，67 版本的最大改进是支持多个配置文件一同运行，在“文件”菜单中，用户可以选择从另一个浏览器导入配置文件。并且，除非您在设置中允许，否则添加到浏览器的任何新扩展都无法在隐私模式中运行。
New
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Intent to ship: WebRender was enabled by default in Betas since Firefox 64 for Desktop NVIDIA GPUs on 10 and should be released with Firefox 67 in May
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Firefox 67 willl be able to run different Firefox installs .
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Tabs can now be pinned from the Page Actions menu in the address bar
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Users can block known cryptominers and fingerprinters in the Custom settings or their Content Blocking preferences
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The Import Data from Another Browser feature is now also available from the File menu
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Firefox will now protect you against running older versions of Firefox which can lead to data corruption and stability issues.
Fixed
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Various
Changed
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Firefox no longer supports handling webcal: links with 30boxes.com
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Change to extensions in Private Windows: Any new extensions you add to the browser won’t work in Private Windows unless you allow this in the settings.
Developer
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The DevTools Changes panel now supports copying modified CSS. You can either copy the full changes or individual changed rules.
细心的用户可能注意到了，近期的 Firefox Beta 测试过程都是从 Beta 3 开始的，而更早一些的版本则会出现在 nightly 目录里。
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