Updates 3/23/21 - Firefox

• You’ll encounter less website breakage in Private Browsing and Strict Enhanced Tracking Protection with SmartBlock, which provides stand-in scripts so that websites load properly.

• To further protect your privacy, our new default HTTP Referrer policy will trim path and query string information from referrer headers to prevent sites from accidentally leaking sensitive user data.

• The “Highlight All” feature on Find in Page now displays tick marks alongside your scrollbar that correspond to the location of matches found on that page.

• We’re proud to announce full support for macOS built-in screen reader, VoiceOver.

• We’ve added a new locale: Silesian (szl)

• We’ve fixed several significant accessibility issues:

  • Video controls now have visible focus styling and video and audio controls are now keyboard navigable. (Bug 1681007)
  • HTML is now spoken by screen readers. (Bug 1460378)
  • Firefox now sets a useful initial focus in Add-ons Manager. (Bug 580537)
  • Firefox will now fire a name/description change event when aria-labelledby/describedby content changes. (Bug 493683)

• Various security fixes.   Security Vulnerabilities fixed in Firefox 87 — Mozilla

• To prevent user data loss when filling out forms, we’ve disabled the Backspace key as a navigation shortcut for the back navigation button. To re-enable the Backspace keyboard shortcut, you can change the about:config preference browser.backspace_action to 0. You can also use the recommended Alt + Left arrow (Command + Left arrow on Mac) shortcut instead.
  Firefox keyboard shortcuts

• We've removed items from the Library menu that weren't used often or have other access points in the browser: Synced tabs, Recent highlights, and Pocket list.

• We've simplified the Help menu by reducing redundant items, such as those that point to Firefox support pages that can also be accessed via the Get Help item.

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Available via the internal updater:   Help  /  About Firefox