Do you do a legacy version of Librewolf for Windows 7, as you do with Firefox?
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LibreWolf doesn't build the ESR branch of Firefox that still supports Windows 7/8. So, it would be using 115.0.2-2 which is 9 months out of date and has known security exploits so should not be used.
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The team behind the Supermium project also builds quite current Firefox and Librewolf releases which run under Windows 7
https://github.com/adeii/supermium-portable/releases/
At time of writing, 126.0.1.