First, is this a good discussion forum for uMatrix questions? Gorhill doesn't have one, and Reddit suggested here. Question: does anyone maintain a list of known whitelistings for popular web sites? For example, YouTube doesn't work unless you allow ytimg.com and a few google*.com domains. Ideally these would be minimalist whitelists, e.g. only allow the domains absolutely necessary for site to function normally, but leave extraneous parts (such as ads & trackers) blocked.
Not using uMatrix anymore, some links: Examples of useful rulesets: https://github.com/gorhill/uMatrix/wiki/Examples-of-useful-rulesets Wilders thread: https://www.wilderssecurity.com/threads/umatrix-the-http-switchboard-successor.369601/