I swear I saw something like this here on Lemmy but I can't find it.
I know android manages the RAM very differently than any desktop OS as it frees up RAM in order to have it available for other processes being third party or core ones.
I remember I saw something that you could fiddle with within the Firefox config page.
Or is it not possible on Android?
I'm using Firefox Nightly, because I think it is the only version that has a working pull to refresh.
Cannot reply to your question but there are more firefox versions and forks that support pull to refresh:
Mull (If your device screen supports more than 60Hz this one may feel choppy, because Firefox's Resist Fingerprinting setting limits the refresh rate to 60Hz since v102)