In 2020, Firefox moved to a four-week release cycle, to catch up with Chrome in support for new web features. Chrome switched to a four-week cycle a year later.
The ESR release is based on the regular release cycle of Firefox for desktop. Release cycle details. ESR releases are maintained for more than a year ...
ESR releases are maintained for more than a year, with point releases that coincide with regular Firefox releases. These point releases contain security ...
Upcoming Firefox release dates are listed at whattrainisitnow.com. Thunderbird approximately (i.e. not strictly) follows the ESR schedule listed there. Past ...