Convert LaTeX to Unicode by pressing "Alt + W" in input and textarea.
This extension helps you input mathematical Unicode symbols and Greek letters without copy-pasting.
Website: https://chiawendt.github.io/tex-to-unicode/
Chrome Extension: https://chrome.google.com/webstore/detail/tex-to-unicode/kdojinhjlhbmmbfogccabogomjpjijif
Firefox Extension: https://addons.mozilla.org/en-US/firefox/addon/tex-to-unicode/