I assume the language is something that is overwritten when an update is applied so you have to rechose the default language

Hello hirwans,

Did you download Firefox in English from here (?) :

https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

If so, would you try to start Firefox with the -purgecaches command line switch - see the last comment in this bug report :

https://bugzilla.mozilla.org/show_bug.cgi?id=1564998

Try to add the full path to the Firefox installation folder:

"C:\Program Files\Mozilla Firefox\firefox.exe" -purgecaches

(64-bit Firefox) "C:\Program Files\Mozilla Firefox\"

Any difference ?

Also see : https://developer.mozilla.org/en-US/Command_Line_Options

Thank you for the kind respond and guidance, I am not a technical person who comprehend your guidance, hence I just try to emulate literally as robot and follow the suggested "additional notation on the Firefox.exe with the notation described(-purgecaches )"? see what happens when it restart after this respond. Highly appreciated the assistance.

Regards Hirwan

McCoy said

Hello hirwans, Did you download Firefox in English from here (?) : https://www.mozilla.org/en-US/firefox/all/#product-desktop-release If so, would you try to start Firefox with the -purgecaches command line switch - see the last comment in this bug report : https://bugzilla.mozilla.org/show_bug.cgi?id=1564998 Try to add the full path to the Firefox installation folder: "C:\Program Files\Mozilla Firefox\firefox.exe" -purgecaches (64-bit Firefox) "C:\Program Files\Mozilla Firefox\" Any difference ? Also see : https://developer.mozilla.org/en-US/Command_Line_Options

This should fix it.