What is JSLibCache?
Difference between JSLibCache and Decentraleyes / LocalCDN JSLibCache fetches resources from CDNs dynamically, once. So if a website you visit requests https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js and that lib is not yet in the local cache, it is fetched from the CDN and put into local storage for subsequent requests.
JSLibCache is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install JSLibCache if you trust the publisher.
JSLibCache has earned a fairly good reputation and likely can be trusted.