Firefox (64-bit)

What's new in this version:

New:
- Better recommendations: You may see suggestions in regular browsing mode for new and relevant Firefox features, services, and extensions based on how you use the web (for US users only)
- Enhanced tab management: You can now select multiple tabs from the tab bar and close, move, bookmark, or pin them quickly and easily
- Easier performance management: The new Task Manager page found at about:performance lets you see how much energy each open tab consumes and provides access to close tabs to conserve power
- Improved performance for Mac and Linux users, by enabling link time optimization (Clang LTO). (Clang LTO was enabled for Windows users in Firefox 63.)
- More seamless sharing on Windows: Windows users can now share web pages using the native sharing experience. You can access Share in the Page Actions menu
- Added option to remove add-ons using the context menu on their toolbar buttons
- New for enterprise users: Updated the policy engine on macOS to allow using configuration profiles to customize Firefox for enterprise deployments

Fixed:
- Various security fixes

Changed:
- RSS feed preview and live bookmarks are available only via add-ons
- TLS certificates issued by Symantec are no longer trusted by Firefox. Website operators are strongly encouraged to replace any remaining Symantec TLS certificates as soon as possible.
- about:crashes has been redesigned to make it clear when a crash is being submitted to Mozilla, as well as being clear that removing crashes locally does not remove them - from crash-stats.mozilla.com
- The macOS keyboard shortcut to add "www" and ".com" to a URL is now ctrl-enter instead of [apple]-enter

Developer:
- You may now overlay multiple CSS grids at the same time (up to 3) in the CSS Grid Inspector
- The Web Console's command line now highlights JavaScript syntax
- When hovering over elements in the Accessibility panel, the contrast ratio of text against background is now indicated
- Added support for the new CSS scrollbar specification
- WebVR is now available on macOS