This feature was originally launched in Firefox's ETP Strict mode. Enhanced the privacy of the Firefox Browser's Private Browsing mode with Total Cookie Protection, which confines cookies to the site where they were created, preventing companis from using cookies to track your browsing across sites. Third party Facebook scripts are blocked to prevent you from being tracked, but are now automatically loaded 'just in time' if you decide to 'Log in with Facebook' on any website. Version 2 of Firefox's SmartBlock feature further improves private browsing. Firefox for Windows now offers a new page about:third-party to help identify compatibility issues caused by third-party applications On Windows, updates can now be applied in the background while Firefox is not running. Firefox now supports logging into Microsoft, work, and school accounts using Windows single sign-on. Learn more For more information, see the Firefox 89 release notes. What's new in v91 ESR (see the release notes for more)? If you can live without the latest browser features then Firefox ESR will repay you with improved stability and fewer compatibility issues You really don't want to have to get into huge firefights because a browser update has caused problems, stability is far more important - and if that sounds like you then opting for Firefox ESR could be a very good idea.

If you're managing Firefox deployment in a business, though, or anywhere else with a large number of users, then it's a different story. Firefox ESR will remain at v68 for many months, so you'll be missing out on all the new interface tweaks, tab options and assorted browser speeds which Mozilla have added in the past few months. If you're a home user then this probably means that Firefox ESR isn't for you. Every time standard Firefox is updated, Firefox ESR will incorporate all the latest security updates in its own minor upgrade, so the program will be every bit as safe to use: you just won't have all the latest features.

Of course this doesn't mean the browser will see no movement at all for an entire year. While standard Firefox sees a major release every 6 weeks or so, Firefox ESR will only move a whole release number every 54 weeks, meaning that you're much less likely to find some new tweak has broken your favourite extensions. Mozilla Firefox Extended Support Release (ESR) is, essentially, a slower-moving, more stable version of the regular browser.

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