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Mozilla Firefox for Linux 66.0.2 – Software Reviews, Downloads

Mozilla Firefox for Linux is a fast, full-featured Web browser. It offers great security, privacy, and protection against viruses, spyware, malware, and it can also easily block pop-up windows. The key features that have made Firefox so popular are the simple and effective UI, browser speed and strong security capabilities.Mozilla Firefox 66

The Mozilla Firefox for Linux project is a redesign of Mozilla’s browser component, written using the XUL user interface language and designed to be cross-platform, supporting Linux, Android, Microsoft Windows and Mac OS X operating systems. It is a fast, small and very easy-to-use web browser/navigator/explorer that offers many advantages over other similar products, such as the ability to block pop-up windows and the feature-rich tabbed browsing experience.

Quantum is Mozilla’s project to build the next-generation web engine for Mozilla Firefox for Linux users, building on the Gecko engine as a solid foundation. Quantum will leverage the fearless concurrency of Rust and high-performance components of Servo to bring more parallelization and GPU offloading to Firefox.

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Firefox (Quantum) users will be impressed by the modern new design that puts their needs first. With the new (fast and fluid Photon) design, Firefox leaps ahead with a new interface that reflects today’s reality of High DPI displays and users who are more task focused than they’ve ever been. Photon doesn’t just look good, it’s also smarter. If you’re using Photon on a Windows PC with a touch display, the menus change size based on whether you click with a mouse or touch with a finger.

Mozilla Firefox for Linux includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.

Features at a glance

The application offers a well designed graphical user interface that integrates search (powered by Google, Bing, Yahoo, etc.), and industry leading accessibility with Find As You Type – find links and page text by simply typing. As mentioned before, the Firefox browser features comprehensive pop-up controls, which will keep unwanted advertising off your desktop. A tab browsing mode will let you open several pages in a single window, allowing you to load links in the background without leaving the page you’re on.

Powerful plugin architecture

Moreover, the Mozilla Firefox web browser includes simplified privacy controls that let you cover your tracks more effectively, a streamlined browser window that allows you see more of the page than any other web browser, while at the same time being more configurable. A large variety of free downloadable extensions and themes that add specific functionality and visual changes to the browser are available to users from the official Mozilla website.

Features a Private Mode

The Private Mode, the ability to Pin tabs, which will always be there when you need them (even after a restart), the powerful Firefox Sync functionality that helps users to keep all of their passwords, bookmarks, browsing history, preferences, tabs, and add-ons in perfect sync across multiple devices, and much more other amazing features are all part of the world’s best web browser, Mozilla Firefox.

Better than Google Chrome and Opera

Because the Opera and Google Chrome web browsers are now based on Chromium, which has a poor collection of extensions, the Mozilla Firefox web browser became the number one choice for many Linux-based operating systems, including Ubuntu, Linux Mint, Debian, openSUSE, Fedora, Red Hat Enterprise Linux, and others.

2x faster

Powered by a new, cutting-edge engine, Firefox has doubled its speed from last year. Because the Internet waits for no one.

Lean, mean speed machine

Firefox Quantum’s new engine uses 30% less memory than Chrome, so other programs won’t slow down during browsing. Now that’s a win-win.

Beautiful, intelligent design

Hello, gorgeous! Mozilla Firefox for Linux sleek, new look comes loaded with intuitive features like in-browser screenshots and more.

New Tab

Search across multiple sites, view your top pages and discover new content.

Powerful privacy

You’re in control of your online information. Use Mozilla Firefox for Linux Private Browsing to block ads with trackers for extra peace of mind… and pages that load up to 44% faster.

Browse for good

Firefox is backed by the non-profit Mozilla, who keeps the Internet healthier through programs that support tech education for girls, create trust around factual news, bring civility to the comments section and more.


Enjoy everything you’ve saved to Firefox while browsing in one, easy place.


Personalize Firefox with your favorite extras that help you do you.

Mobile Browsing

Access your bookmarks, open tabs and passwords across all your devices.

Shape Up Your Floats

CSS Shapes lets a floated element sculpt the flow of content around it beyond the classic rectangular bounding box we’ve been constrained to. For instance, in the above screenshot and linked demo, the text is wrapping to the shape of the grapes vs the image’s border. There are properties for basic shapes all the way up to complex polygons. There are of course great docs on all of this, but Firefox 62 also includes new tooling to both inspect and visually manipulate CSS Shapes values.

You can learn more in Josh Marinacci’s post on the new CSS Shapes tooling from yesterday.

Variable Fonts Are Here

No punny title, I’m just excited! OpenType Font Variations allow a single font file to contain multiple instances of the same font, encoding the differences between instances. In addition to being in one file, font creators can expose any number of variation axes that give developers fine-grained control on how a font is rendered. These can be standard variations like font weight (font weight 536 looks right? no problem!) or things that were never previously available via CSS (x-height! serif-size!). In addition to the candy-store possibilities for typography nerds, being able to serve a single file with multiple variants is a major page weight savings. Dan Callahan goes much deeper on the grooviness to be found and how Firefox makes it easy to tweak these new custom values.

Devtools Commands

The Developer Toolbar was an alternate command repl input in the Firefox Developer tools, apart from the Web Console. I say “was” because as of Firefox 62, it has been removed. It was always a bit hard to find and not as well-advertised as it could be, but did encapsulate some powerful commands. Most of these commands have been progressively migrated elsewhere in the devtools, and this is wrapped up in Firefox 62, so we’ve removed the toolbar altogether.

One of the last commands to be migrated is screenshot, which is a power-user version of the “take a screenshot” button available in the devtools UI. The screenshot command is now available as :screenshot in the Web Console. For example, have you ever needed a high-res screenshot of a page for print? You can specify a higher pixel density for a screenshot via the command: :screenshot –dpr 4

There are a bunch of other options as well, such as specifying output filenames, capture delays, and selector-cropped screenshots. Eric Meyer wrote a great primer on the power of :screenshot on his blog, and it will change your page capture game.

What’s New for Mozilla Firefox for Linux:

  • Support for the AV1 video codec is now activated on Windows
  • Added the ability to search through your open tabs from the tab overflow menu
  • Web Extensions keyboard shortcuts can now be managed or overridden from about:addons
  • Added experimental Touch Bar support on macOS
  • The home page in a Private Browsing windows now includes a search field which uses your default search engine

Download: Firefox 66.0.2 for Windows | Firefox 64-bit | ~40.0 MB (Freeware)
Download: Firefox 66.0.2 for Linux | 64-bit | ~60.0 MB
Download: Firefox 66.0.2 for MacOS | 64.8 MB
View: Firefox Home Page | Release Notes (Not yet available)

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Simmyideas Tech Hub reviews the latest mobile phones, smart gadgets, software, Tech Tips and other related Tech Products. We aim to deliver honest reviews, from a user perspective to help you choose the best tech for your needs.

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