MUltiple Prefixes

Question

Several prefixes for different browser.....

Answer 1

What's the question?
Do you mean what are vendor prefixes in web browsers?

Check below links for info.
https://developer.mozilla.org/en-US/docs/Glossary/Vendor_Prefix
http://css-snippets.com/browser-prefix/
https://www.thoughtco.com/css-vendor-prefixes-3466867

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https://www.sololearn.com/Discuss/333866/how-to-maximize-your-chances-of-receiving-useful-answers-in-forums