I tried reproducing the bug, but I get an error page saying my device is not supported. They require Android 7.0 or above, and I'm testing on Android 15. Same with Chrome. :Kanaru Sato, can you still reproduce the bug?
Bug 1975933 Comment 1 Edit History
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(edit) I used a VPN set to Japan and could reproduce the bug. I don't know yet why the behavior is different between Chrome and Fenix though.