Firefox 76

• Firefox 76
• Firefox 76.0
• Firefox 76 Portable
• Firefox Setup 76.0.1
• Firefox 76 Mactype
• Firefox 76 Download

May 05, 2020 Firefox 76 for developers This article provides information about the changes in Firefox 76 that will affect developers. Firefox 76 was released on May 5, 2020. See also the accompanying hacks post — Firefox 76: Audio worklets and other tricks. May 05, 2020 Mozilla has released Firefox 76 today, May 5th, 2020, to the Stable desktop channel for Windows, macOS, and Linux with bug fixes, new features, and security fixes. Included with today's release are. Firefox 86.0.1 64-bit (US English) Directory of other versions and languages. Important: By default, Firefox is set for automatic updates. To prevent Firefox from automatically updating itself after you install an older version, you'll need to change your Firefox update settings: Click the menu button and select Options. Firefox 76 or Firefox 5.6.6 makes no difference to me really. With browsers everyone should aim to be on the latest version and definitely not very old versions. To know if Firefox 76 is the latest or really old you need to get some more information. I wonder if anyone has tried to do it as follows. May 05, 2020 Firefox's features are robust and generally competitive. The most important feature in the modern Firefox is Sync.Sync now smoothly syncs your bookmarks, passwords, preferences, history, and tabs, not only with other computers, but also with your Android version of Firefox.

Information and links to do with Firefox 76. This may be useful for Mozilla contributors actively working on the release. It is also a record for future reference.

About the 76 release

• Release owner: Ryan VanderMeulen (:RyanVM)
• Corresponding ESR release: 68.8.0
• Milestones document for the 76 cycle timeline from Nightly to release.
• QA: Test Plan - PI requests - [Feature priorities]
• All experiments for 76
• Postmortem notes, 2 weeks after the release.

Release checklists

• Working checklists for 76
• Blank checklist templates

Process docs

• Off-train releases - Various ways to ship features that aren't in-tree.
• Guidelines for relman: Uplift rules - Release tracking rules
• Security: Sec Triage - Sec-approval -

Dates of 76 releases

76.0a1 Nightly

• First released: 2020-03-09

76 Beta

Firefox 76

• 76.0b1 (dev ed and beta channels): 2020-04-07

• 75.0b6 End of EARLY_BETA_OR_EARLIER: 2020-04-17
• Release notes - staging - final

76.0 Release

• 2020-05-05
  • desktop: https://www.mozilla.org/firefox/76.0/releasenotes/
  • fennec 68.8: https://www.mozilla.org/firefox/android/68.8.0/releasenotes/

Firefox 76.0

Queries

• Mission Control crash dashboard: https://metrics.mozilla.com/~sguha/mz/missioncontrol/ex1/mc2/beta.html
• Mission Control daily snapshots: https://docs.google.com/spreadsheets/d/1F9mHl1o3nocVbLXTz7x2KdmNiUpIRDJgN5TN2MmbtFA/edit?pli=1#gid=274778338

This article provides information about the changes in Firefox 76 that will affect developers. Firefox 76 was released on May 5, 2020.

See also the accompanying hacks post — Firefox 76: Audio worklets and other tricks.

Changes for web developers

Developer tools

Debugger

• You can now enable/disable blackboxing of source groups and folders listed in the Source list pane via context menu options (bug 1118152).
• The Call stack pane's Copy stack trace context menu option now copies full URLs, not just filenames (bug 1619039).

Firefox 76 Portable

Network monitor

• In the network request list, you can now double-click a column divider to resize the column to the left of it to fit its contents (bug 1615102).
• The network request Copy > Copy as cURL context menu option has a new option available, --globoff, which suppresses cURL's globbing (wildcard matching) feature if the copied URL includes square bracket characters (bug 1549773).
• The Messages tab of the details pane for web socket requests has a new filter — Control — for showing control frames, and the filters are now grouped together into a selection lst (bug 1566780).

Web console

• In multi-line mode, code snippets longer than five lines are abbreviated to five lines, preceded by a disclosure triangle (or 'twistie'), and followed by an ellipsis (…). You can click anywhere in this area to show the code, and click again in that area to collapse it (bug 1578212).
• DOM element references outputted into the console now have a 'Reveal in inspector' context menu option, which shows the element in the HTML pane of the Page inspector (bug 1612276).

Remote debugging

Firefox Setup 76.0.1

• Because of differences in DevTools versions, it is not possible to debug releases of Firefox for Android that are based on version 68, from desktop Firefox versions 69 or later. When attempting to do this, the Firefox desktop browser will now show a message informing the user of this problem, and offering possible next steps (bug 1625906). See Connection to Firefox for Android 68 for more information.

HTML

• The <input> element's min and max attributes now work correctly when the value of min is greater than the value of max for control types whose values are periodic (that is, values that wrap around at some point). This is particularly helpful, for example, with date and time inputs, where you might want to specify a time range of 11 PM to 2 AM (bug 1608010).

CSS

Firefox 76 Mactype

• Firefox now supports CSS4 system colors (bug 1590894).

SVG

JavaScript

• The numberingSystem and calendar options of the Intl.NumberFormat, Intl.DateTimeFormat, and Intl.RelativeTimeFormat constructors are now enabled by default (bug 1625975).

APIs

New APIs

• Firefox now supports audio worklets by default, with support for AudioContext.audioWorklet, which lets you use the AudioWorkletProcessor and AudioWorkletNode interfaces to process audio in real time off the main thread (bug 1616725).

DOM

• UI-parts related items in the windowFeatures parameter of window.open() can no longer control the visibility of each UI part separately, but become a condition for whether to open a popup or not (bug 1507375).
• Attempts to navigate to an unknown protocol using methods such as location.href or <meta http-equiv='refresh'> are now blocked (see bug 1528305; also see Navigation to unknown protocol will be blocked for more information).
• The IntersectionObserver() constructor now accepts a Document object as its root, as well as an Element object (bug 1623623). This lets you explicitly use a window's entire content area as the intersection bounds.
• The Fetch API now supports the audioworkletdestination for requests. This causes received data to be dispatched to an AudioWorklet (bug 1402784).

Removals

• We've completely removed the Window appinstalled event (and the associated Window.onappinstalled handler property) — these were never shipped, and have now been removed from the Web Manifest spec (bug 1625384).

Firefox 76 Download

HTTP

Security

No changes.

WebDriver conformance (Marionette)

• Firefox no longer reports false for navigator.webdriver when used for automation / testing via geckodriver (bug 1632556).

Changes for add-on developers

See also

Older versions