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Number 1: Auto Rename Tag

Auto rename tag is a super cool extension for VS code users. Auto rename tag name automatically renames when you rename starting or ending tag. 

For more information click here. Auto Rename Tag

Number 2: Material Icons

This VS code extension will give you different types of icons according to your file extension like .js/  .HTML / .css / .jsx. you can try to see. 

Number 3: Prettier

One of the most favorite extensions. All of the developers use prettier code formatter. This extension format all code when you will save the file. If it doesn't work properly then follow the below solution:

File > Preferences > Settings > Search for "default formatter" Make sure your Editor: Default Formatter field is not null . you should fill it by esbenp. prettier-vscode and that all the languages below are ticked. 

and next step is

You have to check "format on Save" in VSCode: Setting >>User > Text Editor > Formatting

Number 4: Live server

you can watch live what happened or what changes occurred when you add or remove code from VS code Text Editor.

Number 5: Quokka.js

It also provides real-time output in vs code text editor. No need to run a terminal to see the JavaScript code output. This is an awesome extension

Number 6: Visual Studio IntelliCode

This extension provides AI-Assisted Intellisense by showing recommend completion items for your code context.

Number 7: Code Spell Checker

Check source code Spelling that makes you more professional.
 
Number 8: Autosave after millisecond delay.

Autosave feature vs code provides automatically. You do not need to install any extension.
just go to File>see below autosave is present.

Number 9: CSS Peek

This VS code extension will boost up your CSS coding speed. you can access an external CSS file from an HTML file. you can also edit CSS properties from an Html file.