If it crashes because of run out of memory, the tablet will stay that way, i.e., it does NOT release the 'hogged' memory; check free memory, 1kB free. Even Skype will not run. Reboot did NOT solve it.
Once I repartition with 150 MB space, just for the Fennec, no more issue, no crash over 24 hrs, so far.
BTW, Fennec reported 4 MB. I suspect it takes more than 4 MB. And if you try to run with whatever 10 MB from your tar, I strongly suspect it is going to crash.
3231 Cache 2436 XPC.mfasl 643 XUL.mfasl 65 cert8.db 1 compatibility.ini 259 compreg.dat 7 cookies.sqlite 7 cookies.sqlite-journal 3 downloads.sqlite 1274 extensions 1 extensions.cache 1 extensions.ini 5 extensions.rdf 17 key3.db 1 localstore.rdf 1 lock 3 permissions.sqlite 259 places.sqlite 1 places.sqlite-journal 2 pluginreg.dat 2 prefs.js 20 search.json 3 search.sqlite 17 secmod.db 12 signons.sqlite 13 weave 101 xpti.dat