One time I was dealing with a really bad migraine while I was running register at Walmart. I was barely functioning and could barely stand up straight. This lady comes through my line starting out all compassionate until she suggests that she lead me in a prayer that Jesus might heal me. I try to politely decline because I'd rather not hold up the line forming behind her. Well, also because I'm atheist but I had been in customer service for years at that point and knew better than to bring that tidbit up.
This lady starts into the most hate fueled tirade I've ever heard. Talking about how I'm a heathen, my migraine was a punishment directly from God, I deserve every second of my suffering, and calling me everything but a child of God. All because I tried to politely decline a performative prayer from her because there were now 3 people in line behind her. Like 20 minutes later I got taken out in an ambulance because I fainted from the pain trying to stand up after using the bathroom on my break.
Another guy tried to get me to discount his entire order because he supposedly knew the guy that owned the contacting company that built the store. Try to tell him that I don't have the ability to do that and he'd have to talk to a manager. He gets right up in my face and starts yelling about how no one else ever had a problem with it and how with one phone call he could make it so I would never be able to work at Walmart again. Along with several threats to my person. If I never set foot behind a cash register again it'll be too soon.
I believe they're referring to the upcoming Manifest V3 changes. My understanding is that currently uBlock uses the old Manifest V2 that they're ending support for once V3 gets pushed. I believe there is a V3 version of uBlock but because of the limitations in V3 it's not as effective at blocking ads.