Despite that resources are not an issue for me, I still like Pale Moon. For general sprightliness, it's hard to beat on many sites.
Even on the "new-to-me" Dell Latitude lappie - Core2Duo & 4GB DDR2 - I can run the newest version without any hassle.....but v29.4.1 just seems faster, somehow!
'Zilla-based browsers do have their advantages at times, though I've never been all that keen on Firefox. I switched to it from Internet Exploder back in the mid-2000s because literally anything was preferable to MyCrudSoft's sorry excuse for a browser. Mozilla did me a big favour, though, by developing horrendous memory-leakage and crashing issues around 2007.....just in time for me to sign-up to the then brand-new Chrome 'beta' testing programme in late Summer of that year.
I've been kinda "hooked" ever since, despite that Chrome itself went through a long spell of dreadful bloat and excessive RAM usage.....much of which has been mitigated in recent years with the 'LazyLoading' feature (doesn't load all of a web-page, only the bits you're approaching at any given time). It's made a big difference.
My usual 'go-to' varies between SlimJet & Pale Moon for 32-bit Puppies, and Brave & Opera on 64-bit. Much of the time in my 'daily-driver' (jrb's 'lite' spin on Barry's old Quirky64 April 7.0.1), I just suspend overnight, and pretty much leave Opera up-and-running all the time (runs in a Fossapup64 chroot). With their 'workspace' feature, which lets you group tabs by similarity, it's the perfect set-up for me.
Mike.