Firefox 75 Download

Firefox makes it to version 54, Mozilla dubs it 'the best Firefox' Mozilla has announced the latest update to its popular web browser. Firefox is now up to version number 54 with changes that, according to the company, make it 'the best Firefox in history' thanks to an important performance tweak in the form of multiprocess support when loading tabs.
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Firefox 75 Download Offline
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Mozilla Firefox 75.0 Download

Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows a number of additional features that work with you to help you get.

Other Languages:

Stable: http://www.mozilla.org/en-US/firefox/all/
Beta: http://www.mozilla.org/en-US/firefox/beta/all/

Installation
Installing Firefox was a fine , quick experience.A new feature checks your add-ons to see which ones you installed and which ones come from third-party vendors, such as security suite makers. The browser will now ask you if you'd like to disable any of these third-party add-ons.

Interface
The menu bar has been squished into an orange button on the upper left, with menu options spread across two columns.the menu makes it much easier to get to bookmarks, add-ons, and history, as they now all live on one Menu pane.

Performance
Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product.Mozilla plans to crowdsource its performance data to learn more about how the browser performs in real-world situations.

Features
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.

This article provides information about the changes in Firefox 75 that will affect developers. Firefox 75 was released on April 7, 2020.

See also the accompanying hacks post — Firefox 75: Ambitions for April.

Changes for web developers

Developer tools

It is now possible to resize the rectangle of the Measuring Tool (bug 1152321).
In the inspector, you can now use XPath expressions to locate elements, in addition to locating elements using CSS selectors as before (bug 963933).
You can now filter WebSocket messages using regular expressions, in addition to plain text search, by writing the regular expression in slashes (bug 1593837).

HTML

The loading attribute of the <img> element has now been implemented. This string value can be used to specify that the image should be lazily loaded, by setting its value to lazy (bug 1542784).
The value of the <style> element's type attribute is now restricted to text/css only, as per the spec (bug 1614329).

CSS

Support for the min(), max(), and clamp() functions has been implemented (bug 1519519).
The all value of the text-decoration-skip-ink property has been added (bug 1611965)

Accessibility

The new roles and objects related to ARIA annotations are now exposed in Firefox, on Windows and Linux (bear in mind that these still won't be usable until screenreaders start to support them):

aria-description (bug 1608961).
role='mark' and role='suggestion' (bug 1608965).
role='comment' (bug 1608969).
Multiple IDs on aria-details (bug 1608883).

Note: On macOS, we are first waiting for Apple to define what Safari will expose as Apple-dialect attributes to VoiceOver, and will then follow suit.

JavaScript

Public static class fields are now supported (bug 1535804).
The Intl.Locale class is now supported (bug 1613713).
The Function.caller property has been updated to be aligned with the latest ECMAScript spec proposal. Previously throwing a TypeError, it now returns null if the caller is a strict, async, or generator function (bug 1610206).

APIs

DOM

The HTMLFormElement interface has a new method, requestSubmit(). Unlike the old (and still available) submit() method, requestSubmit() acts as if a specified submit button has been clicked, rather than just sending the form data to the recipient. Thus the submit event is delivered and the form is checked for validity prior to the data being submitted (bug 1613360).
The submit event is now represented by an object of type SubmitEvent rather than a simple Event. SubmitEvent includes a new submitter property, which is the Element that was invoked to trigger the form submission. With this event, you can have a single handler for submit events that can discern which of multiple submit buttons or links was used to submit the form (bug 1588715).
Calling the click() method on a detached element (one not part of a DOM tree) now functions normally, leading to a click event being sent to it (bug 1610821).

Web animations API

Firefox 75 sees numerous additions to the Web Animations API:

Implicit to/from keyframes are now supported, as is automatically removing filling animations that have been replaced by other indefinitely filling animations (bug 1618773). This includes enabling of support for:
The Animation.timeline getter, Document.timeline, DocumentTimeline, and AnimationTimeline features are now enabled by default (bug 1619178).
The Document.getAnimations() and Element.getAnimations() methods are now enabled by default (bug 1619821).

Media, Web Audio, and WebRTC

The RTCPeerConnection.setLocalDescription() method can now be called without arguments, in which case the WebRTC runtime will try to create the new local session description itself (bug 1568292).

HTTP

Security

CSP nonces from non-script sources, such as CSS selectors, and .getAttribute('nonce') calls, are now hidden. Instead, check the .nonce property to access nonces from scripts (bug 1374612).

Plugins

Security

No changes.

WebDriver conformance (Marionette)

Fixed a bug that always caused Marionette to initialize when Firefox starts-up. It has been limited to the command line argument and environment variable now (bug 1622012).
Fixed WebDriver:Print to no longer add extra margins to the document (bug 1616932).
Changed the preference value for network.http.speculative-parallel-limit to 0, to no longer force-disable speculative connections (bug 1617869).

Other