Is that Chrome desktop?
I'll be damned if some browser is going to tell me what extensions I can or cannot run.
You can load anything in Developer Mode from a local folder in your system (that's how you test your extension while working on it).
Read more here:
https://www.reddit.com/r/chrome_extensions/comments/zh4ave/how_to_manually_add_extension_to_chrome_when_i/That should keep it installed until you manually remove it.
If you get any annoying popups about your debug mode extension:
https://stackoverflow.com/a/61572593 
