Emmet/ Show in browser not work

Hello I have imported my project from github its a PHP/Html project with mysql.

I set up mysql, but when I open the index.html file no preview and only show ports from mysql service - 3306 and 33060.

What I have to do.

I assume you are using VS Code. VS Code does not allow preview of local files, but you can install additional extension from Open VSX for it: Open VSX Registry