Thunderbird moving to monthly updates in March

The Thunderbird project has announced
that it is making its Release
channel the default download beginning with the 135.0 release in
March. This will move users to major monthly releases instead of the
annual major Extended Support Release (ESR) that is the current
default.

One of our goals for 2025 is to increase active installations on the
release channel to at least 20% of the total installations. At last
check, we had 29,543 active installations on the release channel,
compared to 20,918 on beta, and 5,941 on daily. The release channel
installations currently account for 0.27% of the 10,784,551 total
active installations tracked on stats.thunderbird.net.