For now, this is only enabled for 1% of eligible Firefox users. If all goes well, e10s will be enabled for more eligible users in the following weeks.
Other changes in Firefox 48 include:
- add-on signing can no longer be disabled. This means you can no longer install add-ons that are not signed by Mozilla, even by forcing "xpinstall.signatures.required" to "false";
- enhanced download protection. Two additional download types were added to the existing Safe Browsing feature: unwanted software (which is software that makes unexpected changes to your computer) and uncommon downloads (which, like the name suggests, it's software that's not commonly downloaded). Also, the Downloads icon now warns if a download has been flagged, and the default action button will be either "open" or "remove", depending on the category. More about this, HERE;
- the address bar results now display "super smart icons" to let you know when a website is already open in a tab or it exists in your bookmarks. This was available in previous versions, but using a different design that made it less noticeable;
- redesigned add-on discovery page;
- the media parser has been redeveloped using the Rust programming language;
- WebRTC improvements, fixes for Heyo, Jabra & Logitech C920 webcam users;
- WebExtensions support is now considered stable;
- Linux: Better Canvas performance with speedy Skia support;
- Windows: Tab (move buttons) and Shift+F10 (pop-up menus) now behave as they should in Firefox customization mode;
- more.
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Unsigned addons can't be installed, even if forced using "xpinstall.signatures.required" set to "false" |
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Redesigned add-on discovery page |
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"Super smart icons" for already bookmarked / opened in a tab websites |
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Ubuntu users: Firefox 48 should be available as an update (via Software Updater) soon.