It's not that my phone was memory-constrained, we're talking a recent Samsung Galaxy flagship[3] - it's purely overly aggressive memory management on part of Firefox.
--
[0] - Have 5 tabs open, all something trivial like HN, put away phone, grab it 5 minutes later, switch to other HN tab, ... wait half a minute for it to reload on a spotty connection at my in-laws' countryside home.
[1] - Talking with others about how we experience technology, I'm starting to feel that I'm abnormally annoyed by large or unpredictable UI latency.
[2] - TypingMind.
[3] - I learned to save up and only buy high-end, thanks to the experience with my first smartphone, that turned out to be underspecced for its own functionality. It's probably a case of [1], but one time I deviated from this rule and got my wife a mid-range phone, we both started to regret it in a few months, so it's not only me who has low tolerance for jank.