Not everyone gets by with the default browser on their computer, and when it comes to picking an alternative, Firefox is one of the most popular out there, having clawed back support from upstart rivals like Google Chrome and Opera in recent years by switching to a rapid release cycle, ensuring major new versions of the browser are released every six weeks.

It’s true to say that individual updates often fail to deliver anything substantial, but cumulatively they roll together to produce a web browser that is radically different to the one – version 4 – that marked the start of a new era back in 2011.

Some of the landmark new features we’ve seen include a per-site Permissions Manager, enhanced Sync options, tabs on demand, silent updates and add-on enhancements. We also saw the launch of specific development branches including UX, which has led to the new Australis user interface, which sees a streamlined tab, revamped menu and customisation features.

One group particularly well served by the rapid release cycle have been developers, and a plethora of tools from Javascript Scratchpad (Firefox 6) to full-blown Developer Toolbar (Firefox 16) have worked their way into successive builds as Firefox courts this important community of users.

And underpinning this all are a constantly evolving set of performance improvements, standards support (HTML5 and CSS3 are constantly being added to, for instance) and bug fixes.

Firefox 66.0 is now in the stable channel. Improvements/changes include:

- Firefox now prevents websites from automatically playing sound.
- Improved search experience. Find a specific webpage faster when you have a lot of tabs open
- Smoother scrolling: Scroll anchoring keeps content from jumping as images and ads load at the top of the page
- Improved performance and better user experience for extensions
- A redesigned keyboard shortcuts section in about:addons makes it easier to view and adjust default shortcuts
- Redesigned certificate error pages help you better understand and resolve issues, including identification of certificate issuers for anti-virus software
- Added basic support for macOS Touch Bar
- Experimenting with an improved Pocket experience in New Tab with different layouts and more topical content
- Improved performance and reduced crash rates by [doubling web content loading processes from 4 to 8 [1]
- Easier, passwordless security: Added support for Windows Hello on Windows 10, allowing you to use your face, fingerprint, or external security keys for website authentication

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Firefox 66 includes smoother scrolling, improved search, Mac Touch Bar support.