Is emoji are browser specific or OS specific?

Hi @kirupa
Is emoji browser specific or operating system specific?
on which version(either OS or Browser) onwards this emoji can work properly. Please share any tutorial so that I can verify and implement it accordingly.

Emojis are typically operating system specific. You can verify on a site like Emojipedia that does a good job cataloging emojis and which OS release/update various emoji versions were made available on.