I-Firefox Isithangami Sokwesekwa

I understand the necessity of some Extensions / add-ons to "Access your data for all websites" and therefore i agree to that for some of them. So here's the question: Is it possible for the data collected by that ADDON to be transmitted over the internet to either the ADDON maker or any other unknown recipient? Or is it that they indeed are collected but stored and processed locally on my computer and never transmitted elsewhere?

Comments on YouTube videos are no longer visible after Firefox version 115.10esr update. They do however work on my other computer which also has Firefox but not an esr version since it has a more current version of windows. I tried deleting all cookies and cache, starting in safe mode, disabling ad-blocking on YouTube but nothing worked. I'm thinking of rolling back to the previous update but would rather have this problem fixed.