The latest Firefox fixes a handful of bugs, eleven of them security vulnerabilities, ranging in impact from low to critical.
New in Firefox 64.0 is the ability to select and manipulate multiple tabs. Hold the Ctrl or Shift key while clicking to select several tabs, then right-click one of the tabs to see some new actions in the context menu. Unfortunately, there’s no visual indication of which tabs have been selected, making this otherwise helpful feature somewhat awkward to use. You can at least see how many tabs you have selected in the context menu, in the Send n Tabs To Device entry.
Firefox’s Task Manager, which you can show by navigating to about:performance, now shows the amount of power being used by each tab and Add-On. This should be very handy for mobile device users.
Starting with Firefox 64.0, TLS certificates issued by Symantec are no longer trusted. You’ll only notice this if you visit a web site that still uses a certificate from Symantec.
The special page about:crashes is improved in Firefox 64.0: it’s now clear when a crash is being submitted to Mozilla, and that removing crashes locally does not remove them from the Mozilla crash stats page.
The release notes for Firefox 64.0 have more details.