Unfortunately permissions to access everything on every website are way to broad for a niche extension like this. There's no guarantee it won't be sold to a malware developer in a month. If you want to use it, I suggest cloning the repo and loading it as an unpacked extension to avoid auto updates.
Also be sure to audit it yourself beforehand if you're going to go that route; there's no use tilting against auto-updates if you haven't gone to the trouble of making sure that malicious code isn't already present.