Detailed difference between Firefox, Beta, Dev and Nightly
https://support.mozilla.org/en-US/questions/1336530
WEB5/18/21, 9:38 AM. more options. Chosen Solution. The answer changes every day. ;-) Firefox, regular release, is version 88.0.1. Firefox Developer Edition is a specially themed version of Firefox Beta, meaning both are future Firefox 89, currently on beta release 13 about 2/3 of the way through the beta cycle.
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