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          See what’s new in Firefox!
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          86.0Firefox Release
          -------------------
       
          February 23, 2021
       
          Version 86.0, first offered to Release channel users on February 23,
          2021
       
          We'd like to extend a special thank you to all of the [52]new
          Mozillians who contributed to this release of Firefox.
       
          At Mozilla, we believe you have a right to privacy. You shouldn’t be
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          that reason, we are continuously working to harden Firefox against
          online tracking of our users.
       
          New
       
            * 
       
              Firefox now [53]supports simultaneously watching [54]multiple
              videos in Picture-in-Picture.
       
            * 
       
              Today, Firefox introduces [55]Total Cookie Protection to Strict
              Mode. In Total Cookie Protection, every website gets its own
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            * 
       
              We've improved our Print functionality with a cleaner design and
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              New print preview screenshot
       
            * 
       
              For Firefox users in Canada, [57]credit card management and
              auto-fill are now enabled.
       
          Fixed
       
            * 
       
              Reader mode now works with local HTML pages.
       
            * 
       
              Using screen reader quick navigation to move to editable text
              controls no longer incorrectly reaches non-editable cells in some
              grids such as on messenger.com.
       
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              after switching tabs in Firefox.
       
            * 
       
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            * 
       
              Links in Reader View now have more color contrast.
       
            * 
       
              Various [58]security fixes.
       
          Changed
       
            * 
       
              On Linux and Android, the protection to mitigate the [59]stack
              clash attack has been activated.
       
            * 
       
              From Firefox 86 onward, DTLS 1.0 is no longer supported for
              establishing WebRTC's PeerConnections. All WebRTC services need to
              support DTLS 1.2 from now on as the minimum version.
       
            * 
       
              Consolidated all video decoding in the new RDD process which
              results in a more secure Firefox.
       
          Enterprise
       
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              Various bug fixes and new policies have been implemented in the
              latest version of Firefox. You can see more details in the [60]Firefox
              for Enterprise 86 Release Notes.
       
          Developer
       
            * [61]Developer Information
       
            * 
       
              CSS image-set() function in CSS is now enabled, allowing for
              responsive images in CSS.
       
            * 
       
              Inactive CSS tool is now showing a warning when margin or padding
              is set on internal table elements.
              Inactive CSS screenshot
       
            * 
       
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              current page. This is a quick way to surface information to a
              developer that something is wrong with their page. Clicking on the
              red exclamation icon navigates the user to the Console panel.
              Develeoper tools: screenshot of number of errors
       
          Get the most recent version
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          1. https://www.mozilla.org/en-US/
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          4. https://accounts.firefox.com/signup?entrypoint=mozilla.org-globalnav&form_type=button&utm_source=mozilla.org-globalnav&utm_medium=referral&utm_campaign=navigation&utm_content=get-firefox-account
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          9. https://blog.mozilla.org/firefox/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=firefox
          10. https://www.mozilla.org/firefox/86.0/releasenotes/
          11. https://www.mozilla.org/en-US/firefox/products/
          12. https://monitor.firefox.com/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=products
          13. https://www.mozilla.org/en-US/firefox/facebookcontainer/
          14. https://getpocket.com/firefox_learnmore/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=products
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          16. https://www.mozilla.org/en-US/firefox/privacy/products/
          17. https://relay.firefox.com/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=products
          18. https://fpn.firefox.com/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=products
          19. https://www.mozilla.org/en-US/about/
          20. https://www.mozilla.org/en-US/about/manifesto/
          21. https://foundation.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=who-we-are
          22. https://www.mozilla.org/en-US/contribute/
          23. https://www.mozilla.org/en-US/about/leadership/
          24. https://careers.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=who-we-are
          25. http://blog.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=who-we-are
          26. https://labs.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=innovation
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          30. https://mixedreality.mozilla.org/firefox-reality/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=innovation
          31. https://commonvoice.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=innovation
          32. https://research.mozilla.org/webassembly/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=nav&utm_content=innovation
          33. https://www.mozilla.org/en-US/firefox/notes/
          34. https://www.mozilla.org/en-US/firefox/beta/notes/
          35. https://www.mozilla.org/en-US/firefox/nightly/notes/
          36. https://www.mozilla.org/en-US/firefox/android/86.0/releasenotes/
          37. https://www.mozilla.org/en-US/firefox/android/beta/notes/
          38. https://www.mozilla.org/en-US/firefox/ios/notes/
          39. https://input.mozilla.org/feedback/firefox/86.0?utm_source=releasenotes
          40. https://bugzilla.mozilla.org/
          41. https://www.mozilla.org/en-US/firefox/86.0/system-requirements/
          42. https://download.mozilla.org/?product=firefox-stub&os=win64&lang=en-US
          43. https://download.mozilla.org/?product=firefox-msi-latest-ssl&os=win64&lang=en-US
          44. https://download.mozilla.org/?product=firefox-latest-ssl&os=win64-aarch64&lang=en-US
          45. https://download.mozilla.org/?product=firefox-stub&os=win&lang=en-US
          46. https://download.mozilla.org/?product=firefox-msi-latest-ssl&os=win&lang=en-US
          47. https://download.mozilla.org/?product=firefox-latest-ssl&os=osx&lang=en-US
          48. https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=en-US
          49. https://download.mozilla.org/?product=firefox-latest-ssl&os=linux&lang=en-US
          50. https://play.google.com/store/apps/details?id=org.mozilla.firefox&referrer=utm_source%3Dmozilla%26utm_medium%3DReferral%26utm_campaign%3Dmozilla-org
          51. https://itunes.apple.com/us/app/firefox-private-safe-browser/id989804926
          52. https://blog.mozilla.org/community/2021/02/17/new-contributors-in-firefox-86/
          53. https://support.mozilla.org/kb/about-picture-picture-firefox
          54. https://blog.mozilla.org/blog/2021/02/23/latest-firefox-release-includes-multiple-picture-in-picture-and-total-cookie-protection/
          55. https://blog.mozilla.org/security/2021/02/23/total-cookie-protection/
          56. https://support.mozilla.org/kb/third-party-trackers
          57. https://support.mozilla.org/kb/credit-card-autofill
          58. https://www.mozilla.org/security/advisories/mfsa2021-07/
          59. https://blog.llvm.org/posts/2021-01-05-stack-clash-protection/
          60. https://support.mozilla.org/kb/firefox-enterprise-86-release-notes
          61. https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/86
          62. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
          63. https://bugzilla.mozilla.org/enter_bug.cgi
          64. https://input.mozilla.org/feedback?utm_source=releasenotes
          65. https://support.mozilla.org/get-involved
          66. https://bugzilla.mozilla.org/buglist.cgi?j_top=OR&f1=target_milestone&o3=equals&v3=Firefox%2086&o1=equals&resolution=FIXED&o2=anyexact&query_format=advanced&f3=target_milestone&f2=cf_status_firefox86&bug_status=RESOLVED&bug_status=VERIFIED&bug_status=CLOSED&v1=mozilla86&v2=fixed%2Cverified&limit=0
          67. https://blog.mozilla.org/press/kits/
          68. https://blog.mozilla.org/press/
          69. https://www.mozilla.org/en-US/firefox/enterprise/
          70. https://www.mozilla.org/en-US/firefox/releases/
          71. https://www.mozilla.org/en-US/firefox/more/
          72. https://blog.mozilla.org/press/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=company
          73. https://blog.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=company
          74. https://careers.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=company
          75. https://www.mozilla.org/en-US/contact/
          76. https://donate.mozilla.org/en-US/?presets=50,30,20,10&amount=30&utm_source=mozilla.org&utm_medium=referral&utm_content=company&currency=usd&utm_campaign=footer
          77. https://www.mozilla.org/en-US/privacy/
          78. https://www.mozilla.org/en-US/firefox/browsers/compare/
          79. https://mozilla.design/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=resources
          80. https://support.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=support
          81. https://bugzilla.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=support
          82. https://www.mozilla.org/en-US/firefox/channel/desktop/#beta
          83. https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly
          84. https://developer.mozilla.org/docs/Tools/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer&utm_content=developers
          85. https://twitter.com/mozilla
          86. https://www.instagram.com/mozilla/
          87. https://twitter.com/firefox
          88. https://www.instagram.com/firefox/
          89. https://www.youtube.com/user/firefoxchannel
          90. https://www.mozilla.org/en-US/privacy/websites/
          91. https://www.mozilla.org/en-US/privacy/websites/#cookies
          92. https://www.mozilla.org/en-US/about/legal/
          93. https://www.mozilla.org/en-US/about/governance/policies/participation/
          94. https://foundation.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=footer
          95. https://www.mozilla.org/en-US/foundation/licensing/website-content/
          96. https://www.mozilla.org/en-US/firefox/browsers/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=sticky-promo
          97. https://monitor.firefox.com/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=sticky-promo
          98. https://www.mozilla.org/en-US/firefox/lockwise/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=sticky-promo
          99. https://getpocket.com/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=sticky-promo
          100. https://vpn.mozilla.org/?utm_source=www.mozilla.org&utm_medium=referral&utm_campaign=sticky-promo