uBO is in Firefox’ “recommended add-ons” list which are reviewed after every update.
You can check their criteria here:
https://support.mozilla.org/en-US/kb/recommended-extensions-program
uBlock Origin is open source and can be freely audited by everyone. https://github.com/gorhill/uBlock
Maybe the should replace their CEO wit AI:
https://www.perplexity.ai/search/consider-the-following-you-are-SHB99o4pQHCsG_BgZrbTLw#0