相關信息：
Mozilla Firefox 52 Beta 6 今日發布，主要增強了Sync同步功能中發送標簽頁的特性，讓觸屏版更好支持多進程運行，之前介紹過的在非HTTPS頁面上如果出現密碼框則會有安全提示在52版本中已經部署。與此同時，52版本削減了對一些舊插件的支持，還優化了下載時的體驗。
Mozilla Firefox 52 Beta 6更新日志：
Firefox Beta January 25, 2017
Version 52.0 beta, first offered to Beta channel users on January 25, 2017
New
Send and open a tab from one device to another with Sync
Windows 8 touch screen support for multiprocess Firefox
Pages containing insecure password fields now display a warning directly within username and password fields.
Changed
Removed Battery Status API to reduce fingerprinting of users by trackers
Removed NPAPI support for plugins other than Flash. Silverlight, Java, Acrobat and the like are no longer supported.
Implemented the Strict Secure Cookies spec which forbids insecure (http:) sites from setting cookies with the "secure" attribute, and in some cases prevents an insecure site from setting a cookie with the same name as an existing "secure" cookie from the same base domain.
Improved experience for downloads:
Notification in the toolbar when a download fails
Quick access to five most recent downloads rather than three
Larger buttons for canceling and restarting
Improved text input with some third-party keyboard layouts on Windows, e.g., keyboard layouts which have chained dead keys, inputs two or more characters with a non-printable key or a dead key sequence, inputs a character even when a dead key sequence failed to compose a character.
Developer
Responsive Design Mode redesigned and enhanced with device selection, network throttling, and more
Screen sharing shows a preview and no longer requires
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