Beautify and syntax highlighting for source code JavaScript, JSON, CSS. From v4.1+, a few more formats are also supported.
< Обсуждения Javascript-css beautify
I cannot reproduce this bug. Have you tried turning off all other scripts? Which site caused you problems?
BUG
On Firefox 63, 64, as long as this script is enabled, it will cause TM to fail. （From Google Translate）