Update to firefox 146.0.0.2040
Changing locale:
- In 
about:configToggleextensions.langpacks.signatures.requiredtofalse - Toggle 
xpinstall.signatures.requiredtofalse - Toggle 
intl.multilingual.downloadEnabledtotrue - Toggle 
intl.multilingual.enabledtotrue - open the langpack for target locale (eg 
firefox-70.0a1.en-CA.langpack.xpiif you want anen-CAlocale). - In 
about:preferencesclick "Set Alternatives" under "Language", move desired locale to the top position, click OK, click "Apply And Restart"