Firefox Nightly Version 100.0a1, first offered to Nightly channel users on March 8, 2022

Some websites might not work correctly in Firefox version 100 due to Firefox's new three-digit version number. You can read about it in our blog post here!

See the Mozilla Support article Difficulties opening or using a website in Firefox 100 for some possible workarounds you can use. You will also find instructions for reporting a broken website so that Mozilla can help fix the problem.

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