Yoroi wallet is maintained by Cardano to store its coins, and through which browser is it better to enter the wallet, and which version is better?
Here you have some info.
Official Cardano light browser-based wallet Yoroi developed in collaboration by IOHK and Emurgo.
Can be used on desktop, as an extension to browsers Chrome, Chromium, or Yandex-Browser.
Can be used on Android devices with the new Android app, or as an extension to Yandex Mobile Browser.
Google Play Android app: https://play.google.com/store/apps/details?id=com.emurgo
Chrome Browser Extension: https://chrome.google.com/webstore/detail/yoroi/ffnbelfdoeiohenkjibnmadjiehjhajb
General Tutorial video: https://www.youtube.com/watch?v=Hd7ZO6dfUHE
How to use “Trezor T” with Yoroi: https://www.youtube.com/watch?v=ew3p1qYSytU
How to use with Ledger Nano S: https://emurgo.io/#/en/blog/how-to-use-ledger-nano-s-with-yoroi-cardano/newsletter/newsletter
(*Same for Nano X, using a cable.)
How to transfer funds from Daedalus vid: https://bit.ly/2Rhej2W
How to create paper wallets with Yoroi: https://youtu.be/TDus3P0utFc
Safety tips: Wallet Safety 101
through opera can i use this wallet?
No. Firefox and Brave in addition to those listed above, no others.