Tutorial: https://quickfever.com/install-older-version-of-chrome-extension
Extension Fonts :
- Disabling concrete extension update. You can do this by editing the extensions manifest json-file
on Windows: C:\Users<USERNAME>\AppData\Local\Google\Chrome\User Data\Default\Extensions<EXTENSION-ID><VERSION>\manifest.json (find out the extensions ID by enabling developer mode in the extension settings page) on Ubuntu for Chromium: ${HOME}/.config/chromium/Default/Preferences
In this file set "update_url" property to something invalid like "https://localhost" for example. For now according to given url updating of that extension is simply impossible.
thank you