Firefox Nightly News

Highlights A new bookmark sync blog post is up. Want to help us test the new syncing backend? Please flip it on in Beta or Nightly, try it out, and … Read more

Highlights The tab hiding WebExtension API is now enabled by default in 61 If you miss Tab Groups, try this WebExtension mstriemer made it so we show a doorhanger the … Read more

Highlights Outreachy internships and GSoC projects have been announced! You can find our Outreachy interns here Google Summer of Code projects An Intent to Ship for tab warming on Windows … Read more

Highlights We removed XUL overlays, a legacy add-on technology. This allowed us to get rid of a bunch of old, complex code. We pushed a bunch of updates to the … Read more

Highlights Activity Stream now lets you set a custom thumbnail for Top Sites! The doorhanger for an extension-controlled homepage now links to a SUMO article, and the doorhanger for an … Read more

Highlights Help us eliminate annoying in-content popups by installing this add-on and reporting when pages display an in-content popup like this: Tab warming has (finally!) been enabled on Nightly This … Read more

Highlights Added section context menus to Activity Stream, allowing for more in-page customizations like reordering. Heads up: The Symantec CA distrust policy action is underway in Nightly. This policy is … Read more

Highlights The WebExtension theme API now supports specifying colors for frame_inactive, tab_loading, icons and icons_attention, button_background, button_background_hover and button_background_active, toolbar_field_separator. We’re experimenting with “early blank first paint” to improve perceived … Read more

Highlights A lot of fixes for Activity Stream drag and drop landed, improving the overall experience! The WebExtension tabs API now supports a hide and a show method, to hide … Read more