1. In the address bar, type: about:config
2. Search for: general.useragent.override
3. Select "String" and then the + button
4. Copy and Paste this into the field:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) AppleWebKit Gecko/20100101 Firefox/125.0
5. Click the Checkmark Blue button. You're done.
6. Now Bookmark this setting so you can delete it when this issue is fixed. Don't forget
１
2、3
4、5
5/5朝の時点では解消した模様～。
Yes, Google rolled back to the previous script URL (whether it's the previous script or an updated script on the old URL, I don't know).
general.useragent.overrideの設定を元に戻さねば～。