It's exactly how it sounds. Reddit loads in 1s on chrome and 30s in Firefox.
I used to blame my computer for not having enough free space, but now that I have 200GB of SSD free, I suppose I need to blame the software at some point.
Yeah but that's experimental and it's supposed to have failsafes and fallbacks. I guess it's possible that it malfunctioned, and I'd never rule out DNS more generally though.
I meant the other way around: Google's DNS being fast and the local one being slow. At least I've experienced on more than one occasion my ISP DNS taking forever to resolve some domain where Cloudflare's or Google's DNS responded quickly.
Personally, I've never had a problem with my daily firefox usage, perf is basically indistinguishable from other major browsers like Chrome and Edge.