Hello Corey! I have tested this and managed to find the build where this behaviour started to occur. It seems it’s started with TB 145.0(20251106212021). I have checked on TB 142.0, 143.0, 144.0 and the problem did not reproduce. Here are the scenarios that I have tried: 1. Installed TB en-US and update from 144.0 ->145.0 ->146.0 in the About Thunderbird the correct information were displayed so the problem described in the bug report was not reproduced. 2. Installed TB NL build and update from 144.0 ->145.0 -> 146.0 in the About Thunderbird the correct information were displayed so the problem described in the bug report was not reproduced . 1. Installed TB en-US, went to General settings -> Language & Fonts and downloaded Nederlands language pack, Apply and Restart, after restart I clicked on About Thunderbird and TB identified as TB beta. I also installed a fresh en-US TB 146.0 changed the language pack to Nederlands, after restart I clicked on About Thunderbird and TB identified as TB beta, so the problem doesn’t necessarily occur when TB is updated to a newer version it’s more like happening when the language pack is changed within TB to nederlands language pack ..
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Hello Corey! I have tested this and managed to find the build where this behaviour started to occur. It seems it’s started with TB 145.0(20251106212021). I have checked on TB 142.0, 143.0, 144.0 and the problem did not reproduce. Here are the scenarios that I have tried: 1. Installed TB en-US and update from 144.0 ->145.0 ->146.0 in the About Thunderbird the correct information were displayed so the problem described in the bug report was not reproduced. 2. Installed TB NL build and update from 144.0 ->145.0 -> 146.0 in the About Thunderbird the correct information were displayed so the problem described in the bug report was not reproduced . 1. Installed TB en-US, went to General settings -> Language & Fonts and downloaded Nederlands language pack, Apply and Restart, after restart I clicked on About Thunderbird and TB identified as TB beta. I also installed a fresh en-US TB 146.0 changed the language pack to Nederlands, after restart I clicked on About Thunderbird and TB identified as TB beta, so the problem doesn’t necessarily occur when TB is updated to a newer version it’s more like happening when the language pack is changed within TB to nederlands language pack .. I have also checked for other languages packs( it, Deutsch, es, Francis, polski) and it doesn’t reproduce.