Mozilla Firefox 49.0.2 今日发布，新版本包含了多线程功能（e10s - Electrolysis支持）的第二阶段，上个月推出的Firefox 48虽有包含，但默认并未启用。至于备受期待的WebExtensions API——集成支持与Chromium浏览器（比如Chrome、Opera、Vivaldi）相同的扩展——仍有所保留。
下载地址:
https://download-installer.cdn.mozilla.net/pub/firefox/releases/49.0.2/
New
Asynchronous rendering of the Flash plugins is now enabled by default. This should improve performance and reduce crashes for sites that use the Flash plugin. (Bug 1307108)
Fixed
Change D3D9 default fallback preference to prevent graphical artifacts (Bug 1306465)
Network issue prevents some users from seeing the Firefox UI on startup (Bug 1305436)
Web compatibility issue with file uploads (Bug 1306472)
Various security fixes
Web compatibility issue with Array.prototype.values (Bug 1299593)
Changed
Diagnostic information on timing for tab switching (Bug 1304113)
Fix a Canvas filters graphics issue affecting HTML5 apps (Bug 1304539)
Reference link to Firefox 49.0.1 release notes